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Finding the Fourth Proportional to 89,978.64, 124,165.08 and 54,180.24

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Solution

The fourth proportional to 89,978.64, 124,165.08 and 54,180.24 is: 74,765.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,978.64 : 124,165.08 = 54,180.24 : x
  2. Step 2: Convert to fraction form
    89,978.64/124,165.08 = 54,180.24/x
  3. Step 3: Cross multiply
    89,978.64x = 124,165.08 × 54,180.24
  4. Step 4: Simplify right side
    89,978.64x = 6,727,293,834.02
  5. Step 5: Solve for x
    x = 6,727,293,834.02/89,978.64
  6. Step 6: Final answer
    x = 74,765.45

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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.