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Finding the Fourth Proportional to 100,681.59, 150,693.78 and 74,020.53

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Solution

The fourth proportional to 100,681.59, 150,693.78 and 74,020.53 is: 110,789.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,681.59 : 150,693.78 = 74,020.53 : x
  2. Step 2: Convert to fraction form
    100,681.59/150,693.78 = 74,020.53/x
  3. Step 3: Cross multiply
    100,681.59x = 150,693.78 × 74,020.53
  4. Step 4: Simplify right side
    100,681.59x = 11,154,433,463.30
  5. Step 5: Solve for x
    x = 11,154,433,463.30/100,681.59
  6. Step 6: Final answer
    x = 110,789.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.