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Finding the Fourth Proportional to 156,391.16, 215,823.15 and 88,404.08

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Solution

The fourth proportional to 156,391.16, 215,823.15 and 88,404.08 is: 121,999.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,391.16 : 215,823.15 = 88,404.08 : x
  2. Step 2: Convert to fraction form
    156,391.16/215,823.15 = 88,404.08/x
  3. Step 3: Cross multiply
    156,391.16x = 215,823.15 × 88,404.08
  4. Step 4: Simplify right side
    156,391.16x = 19,079,645,939.34
  5. Step 5: Solve for x
    x = 19,079,645,939.34/156,391.16
  6. Step 6: Final answer
    x = 121,999.52

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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.