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Finding the Fourth Proportional to 156,356.76, 215,773.10 and 84,736.79

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Solution

The fourth proportional to 156,356.76, 215,773.10 and 84,736.79 is: 116,937.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,356.76 : 215,773.10 = 84,736.79 : x
  2. Step 2: Convert to fraction form
    156,356.76/215,773.10 = 84,736.79/x
  3. Step 3: Cross multiply
    156,356.76x = 215,773.10 × 84,736.79
  4. Step 4: Simplify right side
    156,356.76x = 18,283,918,783.48
  5. Step 5: Solve for x
    x = 18,283,918,783.48/156,356.76
  6. Step 6: Final answer
    x = 116,937.18

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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.