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Finding the Fourth Proportional to 100,443.76, 138,611.10 and 58,001.32

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Solution

The fourth proportional to 100,443.76, 138,611.10 and 58,001.32 is: 80,041.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,443.76 : 138,611.10 = 58,001.32 : x
  2. Step 2: Convert to fraction form
    100,443.76/138,611.10 = 58,001.32/x
  3. Step 3: Cross multiply
    100,443.76x = 138,611.10 × 58,001.32
  4. Step 4: Simplify right side
    100,443.76x = 8,039,626,766.65
  5. Step 5: Solve for x
    x = 8,039,626,766.65/100,443.76
  6. Step 6: Final answer
    x = 80,041.08

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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.