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Finding the Fourth Proportional to 98,948.40, 148,203.90 and 81,452.40

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Solution

The fourth proportional to 98,948.40, 148,203.90 and 81,452.40 is: 121,998.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,948.40 : 148,203.90 = 81,452.40 : x
  2. Step 2: Convert to fraction form
    98,948.40/148,203.90 = 81,452.40/x
  3. Step 3: Cross multiply
    98,948.40x = 148,203.90 × 81,452.40
  4. Step 4: Simplify right side
    98,948.40x = 12,071,563,344.36
  5. Step 5: Solve for x
    x = 12,071,563,344.36/98,948.40
  6. Step 6: Final answer
    x = 121,998.57

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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.