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Finding the Fourth Proportional to 100,042.79, 138,063.48 and 57,614.99

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Solution

The fourth proportional to 100,042.79, 138,063.48 and 57,614.99 is: 79,511.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,042.79 : 138,063.48 = 57,614.99 : x
  2. Step 2: Convert to fraction form
    100,042.79/138,063.48 = 57,614.99/x
  3. Step 3: Cross multiply
    100,042.79x = 138,063.48 × 57,614.99
  4. Step 4: Simplify right side
    100,042.79x = 7,954,526,019.57
  5. Step 5: Solve for x
    x = 7,954,526,019.57/100,042.79
  6. Step 6: Final answer
    x = 79,511.24

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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.