Home / 84,879.36-126,696-78,624

Finding the Fourth Proportional to 84,879.36, 126,696 and 78,624

Calculator

Solution

The fourth proportional to 84,879.36, 126,696 and 78,624 is: 117,358.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,879.36 : 126,696 = 78,624 : x
  2. Step 2: Convert to fraction form
    84,879.36/126,696 = 78,624/x
  3. Step 3: Cross multiply
    84,879.36x = 126,696 × 78,624
  4. Step 4: Simplify right side
    84,879.36x = 9,961,346,304
  5. Step 5: Solve for x
    x = 9,961,346,304/84,879.36
  6. Step 6: Final answer
    x = 117,358.88

Related Problems

Find fourth proportional to 42,439.68, 63,348 and 39,312
Half scale
Find fourth proportional to 169,758.72, 253,392 and 157,248
Double scale
Find fourth proportional to 84,880.36, 126,697.49 and 78,625
Similar ratio
Find fourth proportional to 127,319.04, 190,044 and 117,936
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.