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Finding the Fourth Proportional to 172,006.40, 258,009.60 and 83,432.90

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Solution

The fourth proportional to 172,006.40, 258,009.60 and 83,432.90 is: 125,149.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,006.40 : 258,009.60 = 83,432.90 : x
  2. Step 2: Convert to fraction form
    172,006.40/258,009.60 = 83,432.90/x
  3. Step 3: Cross multiply
    172,006.40x = 258,009.60 × 83,432.90
  4. Step 4: Simplify right side
    172,006.40x = 21,526,489,155.84
  5. Step 5: Solve for x
    x = 21,526,489,155.84/172,006.40
  6. Step 6: Final answer
    x = 125,149.35

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1.5x scale

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.