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Finding the Fourth Proportional to 88,700.85, 132,878.93 and 78,760.93

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Solution

The fourth proportional to 88,700.85, 132,878.93 and 78,760.93 is: 117,988.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,700.85 : 132,878.93 = 78,760.93 : x
  2. Step 2: Convert to fraction form
    88,700.85/132,878.93 = 78,760.93/x
  3. Step 3: Cross multiply
    88,700.85x = 132,878.93 × 78,760.93
  4. Step 4: Simplify right side
    88,700.85x = 10,465,668,444.10
  5. Step 5: Solve for x
    x = 10,465,668,444.10/88,700.85
  6. Step 6: Final answer
    x = 117,988.37

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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.