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Finding the Fourth Proportional to 65,862.03, 90,891.80 and 40,363.47

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Solution

The fourth proportional to 65,862.03, 90,891.80 and 40,363.47 is: 55,702.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,862.03 : 90,891.80 = 40,363.47 : x
  2. Step 2: Convert to fraction form
    65,862.03/90,891.80 = 40,363.47/x
  3. Step 3: Cross multiply
    65,862.03x = 90,891.80 × 40,363.47
  4. Step 4: Simplify right side
    65,862.03x = 3,668,708,543.45
  5. Step 5: Solve for x
    x = 3,668,708,543.45/65,862.03
  6. Step 6: Final answer
    x = 55,702.94

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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.