Home / 79,320-118,980-30,072

Finding the Fourth Proportional to 79,320, 118,980 and 30,072

Calculator

Solution

The fourth proportional to 79,320, 118,980 and 30,072 is: 45,108

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,320 : 118,980 = 30,072 : x
  2. Step 2: Convert to fraction form
    79,320/118,980 = 30,072/x
  3. Step 3: Cross multiply
    79,320x = 118,980 × 30,072
  4. Step 4: Simplify right side
    79,320x = 3,577,966,560
  5. Step 5: Solve for x
    x = 3,577,966,560/79,320
  6. Step 6: Final answer
    x = 45,108

Related Problems

Find fourth proportional to 39,660, 59,490 and 15,036
Half scale
Find fourth proportional to 158,640, 237,960 and 60,144
Double scale
Find fourth proportional to 79,321, 118,981.50 and 30,073
Similar ratio
Find fourth proportional to 118,980, 178,470 and 45,108
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.