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Finding the Fourth Proportional to 78,967.17, 118,472.76 and 43,931.43

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Solution

The fourth proportional to 78,967.17, 118,472.76 and 43,931.43 is: 65,909.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,967.17 : 118,472.76 = 43,931.43 : x
  2. Step 2: Convert to fraction form
    78,967.17/118,472.76 = 43,931.43/x
  3. Step 3: Cross multiply
    78,967.17x = 118,472.76 × 43,931.43
  4. Step 4: Simplify right side
    78,967.17x = 5,204,677,762.85
  5. Step 5: Solve for x
    x = 5,204,677,762.85/78,967.17
  6. Step 6: Final answer
    x = 65,909.39

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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.