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Finding the Fourth Proportional to 78,689.48, 108,588.08 and 44,697.86

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Solution

The fourth proportional to 78,689.48, 108,588.08 and 44,697.86 is: 61,681.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,689.48 : 108,588.08 = 44,697.86 : x
  2. Step 2: Convert to fraction form
    78,689.48/108,588.08 = 44,697.86/x
  3. Step 3: Cross multiply
    78,689.48x = 108,588.08 × 44,697.86
  4. Step 4: Simplify right side
    78,689.48x = 4,853,654,574.02
  5. Step 5: Solve for x
    x = 4,853,654,574.02/78,689.48
  6. Step 6: Final answer
    x = 61,681.11

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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.