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Finding the Fourth Proportional to 172,499.57, 258,661.85 and 78,925.13

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Solution

The fourth proportional to 172,499.57, 258,661.85 and 78,925.13 is: 118,347.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,499.57 : 258,661.85 = 78,925.13 : x
  2. Step 2: Convert to fraction form
    172,499.57/258,661.85 = 78,925.13/x
  3. Step 3: Cross multiply
    172,499.57x = 258,661.85 × 78,925.13
  4. Step 4: Simplify right side
    172,499.57x = 20,414,918,449.36
  5. Step 5: Solve for x
    x = 20,414,918,449.36/172,499.57
  6. Step 6: Final answer
    x = 118,347.65

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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.