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Finding the Fourth Proportional to 71,967.52, 99,314.98 and 40,136.46

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Solution

The fourth proportional to 71,967.52, 99,314.98 and 40,136.46 is: 55,388.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,967.52 : 99,314.98 = 40,136.46 : x
  2. Step 2: Convert to fraction form
    71,967.52/99,314.98 = 40,136.46/x
  3. Step 3: Cross multiply
    71,967.52x = 99,314.98 × 40,136.46
  4. Step 4: Simplify right side
    71,967.52x = 3,986,151,722.17
  5. Step 5: Solve for x
    x = 3,986,151,722.17/71,967.52
  6. Step 6: Final answer
    x = 55,388.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.