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Finding the Fourth Proportional to 115,530.39, 159,432.42 and 63,143.42

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Solution

The fourth proportional to 115,530.39, 159,432.42 and 63,143.42 is: 87,138.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,530.39 : 159,432.42 = 63,143.42 : x
  2. Step 2: Convert to fraction form
    115,530.39/159,432.42 = 63,143.42/x
  3. Step 3: Cross multiply
    115,530.39x = 159,432.42 × 63,143.42
  4. Step 4: Simplify right side
    115,530.39x = 10,067,108,656.26
  5. Step 5: Solve for x
    x = 10,067,108,656.26/115,530.39
  6. Step 6: Final answer
    x = 87,138.19

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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.