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Finding the Fourth Proportional to 100,687.81, 151,038.38 and 29,616.80

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Solution

The fourth proportional to 100,687.81, 151,038.38 and 29,616.80 is: 44,427.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,687.81 : 151,038.38 = 29,616.80 : x
  2. Step 2: Convert to fraction form
    100,687.81/151,038.38 = 29,616.80/x
  3. Step 3: Cross multiply
    100,687.81x = 151,038.38 × 29,616.80
  4. Step 4: Simplify right side
    100,687.81x = 4,473,273,492.78
  5. Step 5: Solve for x
    x = 4,473,273,492.78/100,687.81
  6. Step 6: Final answer
    x = 44,427.16

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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.