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Finding the Fourth Proportional to 156,459.59, 215,913.03 and 84,839.49

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Solution

The fourth proportional to 156,459.59, 215,913.03 and 84,839.49 is: 117,077.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,459.59 : 215,913.03 = 84,839.49 : x
  2. Step 2: Convert to fraction form
    156,459.59/215,913.03 = 84,839.49/x
  3. Step 3: Cross multiply
    156,459.59x = 215,913.03 × 84,839.49
  4. Step 4: Simplify right side
    156,459.59x = 18,317,951,349.55
  5. Step 5: Solve for x
    x = 18,317,951,349.55/156,459.59
  6. Step 6: Final answer
    x = 117,077.85

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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.