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Finding the Fourth Proportional to 138,064.80, 190,419.84 and 89,613.76

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Solution

The fourth proportional to 138,064.80, 190,419.84 and 89,613.76 is: 123,595.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,064.80 : 190,419.84 = 89,613.76 : x
  2. Step 2: Convert to fraction form
    138,064.80/190,419.84 = 89,613.76/x
  3. Step 3: Cross multiply
    138,064.80x = 190,419.84 × 89,613.76
  4. Step 4: Simplify right side
    138,064.80x = 17,064,237,841.00
  5. Step 5: Solve for x
    x = 17,064,237,841.00/138,064.80
  6. Step 6: Final answer
    x = 123,595.86

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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.