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Finding the Fourth Proportional to 78,655.27, 108,541.20 and 48,079.55

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Solution

The fourth proportional to 78,655.27, 108,541.20 and 48,079.55 is: 66,347.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,655.27 : 108,541.20 = 48,079.55 : x
  2. Step 2: Convert to fraction form
    78,655.27/108,541.20 = 48,079.55/x
  3. Step 3: Cross multiply
    78,655.27x = 108,541.20 × 48,079.55
  4. Step 4: Simplify right side
    78,655.27x = 5,218,612,323.81
  5. Step 5: Solve for x
    x = 5,218,612,323.81/78,655.27
  6. Step 6: Final answer
    x = 66,347.91

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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.