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Finding the Fourth Proportional to 88,038.20, 131,854.80 and 72,291.80

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Solution

The fourth proportional to 88,038.20, 131,854.80 and 72,291.80 is: 108,271.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,038.20 : 131,854.80 = 72,291.80 : x
  2. Step 2: Convert to fraction form
    88,038.20/131,854.80 = 72,291.80/x
  3. Step 3: Cross multiply
    88,038.20x = 131,854.80 × 72,291.80
  4. Step 4: Simplify right side
    88,038.20x = 9,532,020,830.64
  5. Step 5: Solve for x
    x = 9,532,020,830.64/88,038.20
  6. Step 6: Final answer
    x = 108,271.42

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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.