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Finding the Fourth Proportional to 98,697.90, 147,828.15 and 81,201.90

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Solution

The fourth proportional to 98,697.90, 147,828.15 and 81,201.90 is: 121,622.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,697.90 : 147,828.15 = 81,201.90 : x
  2. Step 2: Convert to fraction form
    98,697.90/147,828.15 = 81,201.90/x
  3. Step 3: Cross multiply
    98,697.90x = 147,828.15 × 81,201.90
  4. Step 4: Simplify right side
    98,697.90x = 12,003,926,653.49
  5. Step 5: Solve for x
    x = 12,003,926,653.49/98,697.90
  6. Step 6: Final answer
    x = 121,622.92

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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.