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Finding the Fourth Proportional to 64,898.25, 89,478.45 and 54,158.60

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Solution

The fourth proportional to 64,898.25, 89,478.45 and 54,158.60 is: 74,671.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,898.25 : 89,478.45 = 54,158.60 : x
  2. Step 2: Convert to fraction form
    64,898.25/89,478.45 = 54,158.60/x
  3. Step 3: Cross multiply
    64,898.25x = 89,478.45 × 54,158.60
  4. Step 4: Simplify right side
    64,898.25x = 4,846,027,134.78
  5. Step 5: Solve for x
    x = 4,846,027,134.78/64,898.25
  6. Step 6: Final answer
    x = 74,671.15

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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.