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Finding the Fourth Proportional to 108,242.79, 149,439.65 and 67,991.01

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Solution

The fourth proportional to 108,242.79, 149,439.65 and 67,991.01 is: 93,868.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,242.79 : 149,439.65 = 67,991.01 : x
  2. Step 2: Convert to fraction form
    108,242.79/149,439.65 = 67,991.01/x
  3. Step 3: Cross multiply
    108,242.79x = 149,439.65 × 67,991.01
  4. Step 4: Simplify right side
    108,242.79x = 10,160,552,397.59
  5. Step 5: Solve for x
    x = 10,160,552,397.59/108,242.79
  6. Step 6: Final answer
    x = 93,868.17

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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.