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Finding the Fourth Proportional to 72,248.60, 99,718.68 and 43,963.40

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Solution

The fourth proportional to 72,248.60, 99,718.68 and 43,963.40 is: 60,678.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,248.60 : 99,718.68 = 43,963.40 : x
  2. Step 2: Convert to fraction form
    72,248.60/99,718.68 = 43,963.40/x
  3. Step 3: Cross multiply
    72,248.60x = 99,718.68 × 43,963.40
  4. Step 4: Simplify right side
    72,248.60x = 4,383,972,216.31
  5. Step 5: Solve for x
    x = 4,383,972,216.31/72,248.60
  6. Step 6: Final answer
    x = 60,678.99

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1.5x scale

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.