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Finding the Fourth Proportional to 98,699.80, 147,617.70 and 88,245.40

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Solution

The fourth proportional to 98,699.80, 147,617.70 and 88,245.40 is: 131,981.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,699.80 : 147,617.70 = 88,245.40 : x
  2. Step 2: Convert to fraction form
    98,699.80/147,617.70 = 88,245.40/x
  3. Step 3: Cross multiply
    98,699.80x = 147,617.70 × 88,245.40
  4. Step 4: Simplify right side
    98,699.80x = 13,026,582,983.58
  5. Step 5: Solve for x
    x = 13,026,582,983.58/98,699.80
  6. Step 6: Final answer
    x = 131,981.86

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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.