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Finding the Fourth Proportional to 98,691.90, 147,940.65 and 48,779.70

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Solution

The fourth proportional to 98,691.90, 147,940.65 and 48,779.70 is: 73,121.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,691.90 : 147,940.65 = 48,779.70 : x
  2. Step 2: Convert to fraction form
    98,691.90/147,940.65 = 48,779.70/x
  3. Step 3: Cross multiply
    98,691.90x = 147,940.65 × 48,779.70
  4. Step 4: Simplify right side
    98,691.90x = 7,216,500,524.81
  5. Step 5: Solve for x
    x = 7,216,500,524.81/98,691.90
  6. Step 6: Final answer
    x = 73,121.51

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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.