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Finding the Fourth Proportional to 65,397.93, 90,225.99 and 42,749.97

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Solution

The fourth proportional to 65,397.93, 90,225.99 and 42,749.97 is: 58,979.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,397.93 : 90,225.99 = 42,749.97 : x
  2. Step 2: Convert to fraction form
    65,397.93/90,225.99 = 42,749.97/x
  3. Step 3: Cross multiply
    65,397.93x = 90,225.99 × 42,749.97
  4. Step 4: Simplify right side
    65,397.93x = 3,857,158,365.72
  5. Step 5: Solve for x
    x = 3,857,158,365.72/65,397.93
  6. Step 6: Final answer
    x = 58,979.82

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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.