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Finding the Fourth Proportional to 72,458.40, 108,687.60 and 62,738.40

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Solution

The fourth proportional to 72,458.40, 108,687.60 and 62,738.40 is: 94,107.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,458.40 : 108,687.60 = 62,738.40 : x
  2. Step 2: Convert to fraction form
    72,458.40/108,687.60 = 62,738.40/x
  3. Step 3: Cross multiply
    72,458.40x = 108,687.60 × 62,738.40
  4. Step 4: Simplify right side
    72,458.40x = 6,818,886,123.84
  5. Step 5: Solve for x
    x = 6,818,886,123.84/72,458.40
  6. Step 6: Final answer
    x = 94,107.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.