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Finding the Fourth Proportional to 72,270.68, 99,721.62 and 45,394.04

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Solution

The fourth proportional to 72,270.68, 99,721.62 and 45,394.04 is: 62,636.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,270.68 : 99,721.62 = 45,394.04 : x
  2. Step 2: Convert to fraction form
    72,270.68/99,721.62 = 45,394.04/x
  3. Step 3: Cross multiply
    72,270.68x = 99,721.62 × 45,394.04
  4. Step 4: Simplify right side
    72,270.68x = 4,526,767,207.14
  5. Step 5: Solve for x
    x = 4,526,767,207.14/72,270.68
  6. Step 6: Final answer
    x = 62,636.29

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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.