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Finding the Fourth Proportional to 72,473.84, 99,979.76 and 51,264.80

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Solution

The fourth proportional to 72,473.84, 99,979.76 and 51,264.80 is: 70,721.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,473.84 : 99,979.76 = 51,264.80 : x
  2. Step 2: Convert to fraction form
    72,473.84/99,979.76 = 51,264.80/x
  3. Step 3: Cross multiply
    72,473.84x = 99,979.76 × 51,264.80
  4. Step 4: Simplify right side
    72,473.84x = 5,125,442,400.45
  5. Step 5: Solve for x
    x = 5,125,442,400.45/72,473.84
  6. Step 6: Final answer
    x = 70,721.28

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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.