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Finding the Fourth Proportional to 70,877.10, 106,315.65 and 39,708.30

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Solution

The fourth proportional to 70,877.10, 106,315.65 and 39,708.30 is: 59,562.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,877.10 : 106,315.65 = 39,708.30 : x
  2. Step 2: Convert to fraction form
    70,877.10/106,315.65 = 39,708.30/x
  3. Step 3: Cross multiply
    70,877.10x = 106,315.65 × 39,708.30
  4. Step 4: Simplify right side
    70,877.10x = 4,221,613,724.90
  5. Step 5: Solve for x
    x = 4,221,613,724.90/70,877.10
  6. Step 6: Final answer
    x = 59,562.45

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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.