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Finding the Fourth Proportional to 172,139.61, 258,209.22 and 59,819.84

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Solution

The fourth proportional to 172,139.61, 258,209.22 and 59,819.84 is: 89,729.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,139.61 : 258,209.22 = 59,819.84 : x
  2. Step 2: Convert to fraction form
    172,139.61/258,209.22 = 59,819.84/x
  3. Step 3: Cross multiply
    172,139.61x = 258,209.22 × 59,819.84
  4. Step 4: Simplify right side
    172,139.61x = 15,446,033,829.39
  5. Step 5: Solve for x
    x = 15,446,033,829.39/172,139.61
  6. Step 6: Final answer
    x = 89,729.69

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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.