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Finding the Fourth Proportional to 72,660, 100,279.44 and 47,565.12

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Solution

The fourth proportional to 72,660, 100,279.44 and 47,565.12 is: 65,645.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,660 : 100,279.44 = 47,565.12 : x
  2. Step 2: Convert to fraction form
    72,660/100,279.44 = 47,565.12/x
  3. Step 3: Cross multiply
    72,660x = 100,279.44 × 47,565.12
  4. Step 4: Simplify right side
    72,660x = 4,769,803,597.13
  5. Step 5: Solve for x
    x = 4,769,803,597.13/72,660
  6. Step 6: Final answer
    x = 65,645.52

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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.