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Finding the Fourth Proportional to 100,034.57, 138,042.59 and 54,703.74

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Solution

The fourth proportional to 100,034.57, 138,042.59 and 54,703.74 is: 75,488.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,034.57 : 138,042.59 = 54,703.74 : x
  2. Step 2: Convert to fraction form
    100,034.57/138,042.59 = 54,703.74/x
  3. Step 3: Cross multiply
    100,034.57x = 138,042.59 × 54,703.74
  4. Step 4: Simplify right side
    100,034.57x = 7,551,445,952.29
  5. Step 5: Solve for x
    x = 7,551,445,952.29/100,034.57
  6. Step 6: Final answer
    x = 75,488.36

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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.