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Finding the Fourth Proportional to 78,252.84, 108,030.76 and 61,220.88

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Solution

The fourth proportional to 78,252.84, 108,030.76 and 61,220.88 is: 84,517.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,252.84 : 108,030.76 = 61,220.88 : x
  2. Step 2: Convert to fraction form
    78,252.84/108,030.76 = 61,220.88/x
  3. Step 3: Cross multiply
    78,252.84x = 108,030.76 × 61,220.88
  4. Step 4: Simplify right side
    78,252.84x = 6,613,738,194.27
  5. Step 5: Solve for x
    x = 6,613,738,194.27/78,252.84
  6. Step 6: Final answer
    x = 84,517.55

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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.