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Finding the Fourth Proportional to 98,998.80, 148,376.70 and 67,408.80

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Solution

The fourth proportional to 98,998.80, 148,376.70 and 67,408.80 is: 101,030.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,998.80 : 148,376.70 = 67,408.80 : x
  2. Step 2: Convert to fraction form
    98,998.80/148,376.70 = 67,408.80/x
  3. Step 3: Cross multiply
    98,998.80x = 148,376.70 × 67,408.80
  4. Step 4: Simplify right side
    98,998.80x = 10,001,895,294.96
  5. Step 5: Solve for x
    x = 10,001,895,294.96/98,998.80
  6. Step 6: Final answer
    x = 101,030.47

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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.