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Finding the Fourth Proportional to 156,008.91, 215,223.93 and 91,445.42

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Solution

The fourth proportional to 156,008.91, 215,223.93 and 91,445.42 is: 126,154.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,008.91 : 215,223.93 = 91,445.42 : x
  2. Step 2: Convert to fraction form
    156,008.91/215,223.93 = 91,445.42/x
  3. Step 3: Cross multiply
    156,008.91x = 215,223.93 × 91,445.42
  4. Step 4: Simplify right side
    156,008.91x = 19,681,242,953.77
  5. Step 5: Solve for x
    x = 19,681,242,953.77/156,008.91
  6. Step 6: Final answer
    x = 126,154.61

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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.