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Finding the Fourth Proportional to 172,312.92, 258,419.16 and 67,106.88

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Solution

The fourth proportional to 172,312.92, 258,419.16 and 67,106.88 is: 100,640.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,312.92 : 258,419.16 = 67,106.88 : x
  2. Step 2: Convert to fraction form
    172,312.92/258,419.16 = 67,106.88/x
  3. Step 3: Cross multiply
    172,312.92x = 258,419.16 × 67,106.88
  4. Step 4: Simplify right side
    172,312.92x = 17,341,703,559.82
  5. Step 5: Solve for x
    x = 17,341,703,559.82/172,312.92
  6. Step 6: Final answer
    x = 100,640.76

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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.