Home / 84,686.14-126,983.84-28,507.60

Finding the Fourth Proportional to 84,686.14, 126,983.84 and 28,507.60

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Solution

The fourth proportional to 84,686.14, 126,983.84 and 28,507.60 is: 42,746.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,686.14 : 126,983.84 = 28,507.60 : x
  2. Step 2: Convert to fraction form
    84,686.14/126,983.84 = 28,507.60/x
  3. Step 3: Cross multiply
    84,686.14x = 126,983.84 × 28,507.60
  4. Step 4: Simplify right side
    84,686.14x = 3,620,004,517.18
  5. Step 5: Solve for x
    x = 3,620,004,517.18/84,686.14
  6. Step 6: Final answer
    x = 42,746.13

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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.