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Finding the Fourth Proportional to 89,958.60, 124,124.40 and 54,140.40

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Solution

The fourth proportional to 89,958.60, 124,124.40 and 54,140.40 is: 74,702.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,958.60 : 124,124.40 = 54,140.40 : x
  2. Step 2: Convert to fraction form
    89,958.60/124,124.40 = 54,140.40/x
  3. Step 3: Cross multiply
    89,958.60x = 124,124.40 × 54,140.40
  4. Step 4: Simplify right side
    89,958.60x = 6,720,144,665.76
  5. Step 5: Solve for x
    x = 6,720,144,665.76/89,958.60
  6. Step 6: Final answer
    x = 74,702.64

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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.