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Finding the Fourth Proportional to 108,138.64, 149,209.68 and 60,384.64

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Solution

The fourth proportional to 108,138.64, 149,209.68 and 60,384.64 is: 83,318.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,138.64 : 149,209.68 = 60,384.64 : x
  2. Step 2: Convert to fraction form
    108,138.64/149,209.68 = 60,384.64/x
  3. Step 3: Cross multiply
    108,138.64x = 149,209.68 × 60,384.64
  4. Step 4: Simplify right side
    108,138.64x = 9,009,972,811.32
  5. Step 5: Solve for x
    x = 9,009,972,811.32/108,138.64
  6. Step 6: Final answer
    x = 83,318.72

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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.