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Finding the Fourth Proportional to 138,411.80, 191,008.30 and 74,749.62

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Solution

The fourth proportional to 138,411.80, 191,008.30 and 74,749.62 is: 103,154.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,411.80 : 191,008.30 = 74,749.62 : x
  2. Step 2: Convert to fraction form
    138,411.80/191,008.30 = 74,749.62/x
  3. Step 3: Cross multiply
    138,411.80x = 191,008.30 × 74,749.62
  4. Step 4: Simplify right side
    138,411.80x = 14,277,797,841.85
  5. Step 5: Solve for x
    x = 14,277,797,841.85/138,411.80
  6. Step 6: Final answer
    x = 103,154.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.