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Finding the Fourth Proportional to 156,247.71, 215,606.43 and 87,324.45

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Solution

The fourth proportional to 156,247.71, 215,606.43 and 87,324.45 is: 120,499.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,247.71 : 215,606.43 = 87,324.45 : x
  2. Step 2: Convert to fraction form
    156,247.71/215,606.43 = 87,324.45/x
  3. Step 3: Cross multiply
    156,247.71x = 215,606.43 × 87,324.45
  4. Step 4: Simplify right side
    156,247.71x = 18,827,712,916.21
  5. Step 5: Solve for x
    x = 18,827,712,916.21/156,247.71
  6. Step 6: Final answer
    x = 120,499.13

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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.