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Finding the Fourth Proportional to 71,349.60, 106,909.20 and 45,007.20

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Solution

The fourth proportional to 71,349.60, 106,909.20 and 45,007.20 is: 67,438.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,349.60 : 106,909.20 = 45,007.20 : x
  2. Step 2: Convert to fraction form
    71,349.60/106,909.20 = 45,007.20/x
  3. Step 3: Cross multiply
    71,349.60x = 106,909.20 × 45,007.20
  4. Step 4: Simplify right side
    71,349.60x = 4,811,683,746.24
  5. Step 5: Solve for x
    x = 4,811,683,746.24/71,349.60
  6. Step 6: Final answer
    x = 67,438.13

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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.