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Finding the Fourth Proportional to 78,798.85, 108,743.19 and 42,988.97

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Solution

The fourth proportional to 78,798.85, 108,743.19 and 42,988.97 is: 59,325.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,798.85 : 108,743.19 = 42,988.97 : x
  2. Step 2: Convert to fraction form
    78,798.85/108,743.19 = 42,988.97/x
  3. Step 3: Cross multiply
    78,798.85x = 108,743.19 × 42,988.97
  4. Step 4: Simplify right side
    78,798.85x = 4,674,757,732.61
  5. Step 5: Solve for x
    x = 4,674,757,732.61/78,798.85
  6. Step 6: Final answer
    x = 59,325.20

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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.