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Finding the Fourth Proportional to 86,649.95, 129,979.55 and 27,490.18

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Solution

The fourth proportional to 86,649.95, 129,979.55 and 27,490.18 is: 41,236.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,649.95 : 129,979.55 = 27,490.18 : x
  2. Step 2: Convert to fraction form
    86,649.95/129,979.55 = 27,490.18/x
  3. Step 3: Cross multiply
    86,649.95x = 129,979.55 × 27,490.18
  4. Step 4: Simplify right side
    86,649.95x = 3,573,160,438.47
  5. Step 5: Solve for x
    x = 3,573,160,438.47/86,649.95
  6. Step 6: Final answer
    x = 41,236.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.