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Finding the Fourth Proportional to 71,934.80, 107,902.20 and 40,312.40

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Solution

The fourth proportional to 71,934.80, 107,902.20 and 40,312.40 is: 60,468.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,934.80 : 107,902.20 = 40,312.40 : x
  2. Step 2: Convert to fraction form
    71,934.80/107,902.20 = 40,312.40/x
  3. Step 3: Cross multiply
    71,934.80x = 107,902.20 × 40,312.40
  4. Step 4: Simplify right side
    71,934.80x = 4,349,796,647.28
  5. Step 5: Solve for x
    x = 4,349,796,647.28/71,934.80
  6. Step 6: Final answer
    x = 60,468.60

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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.