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Finding the Fourth Proportional to 115,031.95, 158,719.70 and 72,565.88

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Solution

The fourth proportional to 115,031.95, 158,719.70 and 72,565.88 is: 100,125.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,031.95 : 158,719.70 = 72,565.88 : x
  2. Step 2: Convert to fraction form
    115,031.95/158,719.70 = 72,565.88/x
  3. Step 3: Cross multiply
    115,031.95x = 158,719.70 × 72,565.88
  4. Step 4: Simplify right side
    115,031.95x = 11,517,634,091.65
  5. Step 5: Solve for x
    x = 11,517,634,091.65/115,031.95
  6. Step 6: Final answer
    x = 100,125.52

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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.