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Finding the Fourth Proportional to 109,987.87, 151,782.38 and 59,686.87

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Solution

The fourth proportional to 109,987.87, 151,782.38 and 59,686.87 is: 82,367.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,987.87 : 151,782.38 = 59,686.87 : x
  2. Step 2: Convert to fraction form
    109,987.87/151,782.38 = 59,686.87/x
  3. Step 3: Cross multiply
    109,987.87x = 151,782.38 × 59,686.87
  4. Step 4: Simplify right side
    109,987.87x = 9,059,414,884.92
  5. Step 5: Solve for x
    x = 9,059,414,884.92/109,987.87
  6. Step 6: Final answer
    x = 82,367.40

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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.