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Finding the Fourth Proportional to 100,290.92, 138,397.19 and 59,980.86

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Solution

The fourth proportional to 100,290.92, 138,397.19 and 59,980.86 is: 82,771.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,290.92 : 138,397.19 = 59,980.86 : x
  2. Step 2: Convert to fraction form
    100,290.92/138,397.19 = 59,980.86/x
  3. Step 3: Cross multiply
    100,290.92x = 138,397.19 × 59,980.86
  4. Step 4: Simplify right side
    100,290.92x = 8,301,182,177.88
  5. Step 5: Solve for x
    x = 8,301,182,177.88/100,290.92
  6. Step 6: Final answer
    x = 82,771.03

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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.