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Finding the Fourth Proportional to 72,622.73, 99,987.68 and 61,264.01

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Solution

The fourth proportional to 72,622.73, 99,987.68 and 61,264.01 is: 84,348.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,622.73 : 99,987.68 = 61,264.01 : x
  2. Step 2: Convert to fraction form
    72,622.73/99,987.68 = 61,264.01/x
  3. Step 3: Cross multiply
    72,622.73x = 99,987.68 × 61,264.01
  4. Step 4: Simplify right side
    72,622.73x = 6,125,645,880.62
  5. Step 5: Solve for x
    x = 6,125,645,880.62/72,622.73
  6. Step 6: Final answer
    x = 84,348.88

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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.