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Finding the Fourth Proportional to 99,781.10, 149,671.65 and 97,812.80

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Solution

The fourth proportional to 99,781.10, 149,671.65 and 97,812.80 is: 146,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,781.10 : 149,671.65 = 97,812.80 : x
  2. Step 2: Convert to fraction form
    99,781.10/149,671.65 = 97,812.80/x
  3. Step 3: Cross multiply
    99,781.10x = 149,671.65 × 97,812.80
  4. Step 4: Simplify right side
    99,781.10x = 14,639,803,167.12
  5. Step 5: Solve for x
    x = 14,639,803,167.12/99,781.10
  6. Step 6: Final answer
    x = 146,719.20

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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.