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Finding the Fourth Proportional to 71,900.60, 99,223.80 and 40,068.42

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Solution

The fourth proportional to 71,900.60, 99,223.80 and 40,068.42 is: 55,294.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,900.60 : 99,223.80 = 40,068.42 : x
  2. Step 2: Convert to fraction form
    71,900.60/99,223.80 = 40,068.42/x
  3. Step 3: Cross multiply
    71,900.60x = 99,223.80 × 40,068.42
  4. Step 4: Simplify right side
    71,900.60x = 3,975,740,892.40
  5. Step 5: Solve for x
    x = 3,975,740,892.40/71,900.60
  6. Step 6: Final answer
    x = 55,294.96

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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.