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Finding the Fourth Proportional to 172,483.92, 258,725.94 and 77,603.28

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Solution

The fourth proportional to 172,483.92, 258,725.94 and 77,603.28 is: 116,404.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,483.92 : 258,725.94 = 77,603.28 : x
  2. Step 2: Convert to fraction form
    172,483.92/258,725.94 = 77,603.28/x
  3. Step 3: Cross multiply
    172,483.92x = 258,725.94 × 77,603.28
  4. Step 4: Simplify right side
    172,483.92x = 20,077,981,565.08
  5. Step 5: Solve for x
    x = 20,077,981,565.08/172,483.92
  6. Step 6: Final answer
    x = 116,404.95

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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.