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Finding the Fourth Proportional to 65,881.12, 98,791.80 and 28,423.48

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Solution

The fourth proportional to 65,881.12, 98,791.80 and 28,423.48 is: 42,622.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,881.12 : 98,791.80 = 28,423.48 : x
  2. Step 2: Convert to fraction form
    65,881.12/98,791.80 = 28,423.48/x
  3. Step 3: Cross multiply
    65,881.12x = 98,791.80 × 28,423.48
  4. Step 4: Simplify right side
    65,881.12x = 2,808,006,751.46
  5. Step 5: Solve for x
    x = 2,808,006,751.46/65,881.12
  6. Step 6: Final answer
    x = 42,622.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.