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Finding the Fourth Proportional to 100,585.95, 138,803.62 and 60,291.88

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Solution

The fourth proportional to 100,585.95, 138,803.62 and 60,291.88 is: 83,199.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,585.95 : 138,803.62 = 60,291.88 : x
  2. Step 2: Convert to fraction form
    100,585.95/138,803.62 = 60,291.88/x
  3. Step 3: Cross multiply
    100,585.95x = 138,803.62 × 60,291.88
  4. Step 4: Simplify right side
    100,585.95x = 8,368,731,200.61
  5. Step 5: Solve for x
    x = 8,368,731,200.61/100,585.95
  6. Step 6: Final answer
    x = 83,199.80

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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.