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Finding the Fourth Proportional to 100,532.03, 138,788.07 and 77,511.57

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Solution

The fourth proportional to 100,532.03, 138,788.07 and 77,511.57 is: 107,007.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,532.03 : 138,788.07 = 77,511.57 : x
  2. Step 2: Convert to fraction form
    100,532.03/138,788.07 = 77,511.57/x
  3. Step 3: Cross multiply
    100,532.03x = 138,788.07 × 77,511.57
  4. Step 4: Simplify right side
    100,532.03x = 10,757,681,202.97
  5. Step 5: Solve for x
    x = 10,757,681,202.97/100,532.03
  6. Step 6: Final answer
    x = 107,007.51

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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.