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Finding the Fourth Proportional to 65,398.93, 90,227.37 and 42,750.97

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Solution

The fourth proportional to 65,398.93, 90,227.37 and 42,750.97 is: 58,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,398.93 : 90,227.37 = 42,750.97 : x
  2. Step 2: Convert to fraction form
    65,398.93/90,227.37 = 42,750.97/x
  3. Step 3: Cross multiply
    65,398.93x = 90,227.37 × 42,750.97
  4. Step 4: Simplify right side
    65,398.93x = 3,857,307,588.05
  5. Step 5: Solve for x
    x = 3,857,307,588.05/65,398.93
  6. Step 6: Final answer
    x = 58,981.20

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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.