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Finding the Fourth Proportional to 172,666.62, 258,931.86 and 83,893.86

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Solution

The fourth proportional to 172,666.62, 258,931.86 and 83,893.86 is: 125,807.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,666.62 : 258,931.86 = 83,893.86 : x
  2. Step 2: Convert to fraction form
    172,666.62/258,931.86 = 83,893.86/x
  3. Step 3: Cross multiply
    172,666.62x = 258,931.86 × 83,893.86
  4. Step 4: Simplify right side
    172,666.62x = 21,722,793,212.38
  5. Step 5: Solve for x
    x = 21,722,793,212.38/172,666.62
  6. Step 6: Final answer
    x = 125,807.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.