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Finding the Fourth Proportional to 99,428.84, 149,290.14 and 66,354.92

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Solution

The fourth proportional to 99,428.84, 149,290.14 and 66,354.92 is: 99,630.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,428.84 : 149,290.14 = 66,354.92 : x
  2. Step 2: Convert to fraction form
    99,428.84/149,290.14 = 66,354.92/x
  3. Step 3: Cross multiply
    99,428.84x = 149,290.14 × 66,354.92
  4. Step 4: Simplify right side
    99,428.84x = 9,906,135,296.49
  5. Step 5: Solve for x
    x = 9,906,135,296.49/99,428.84
  6. Step 6: Final answer
    x = 99,630.40

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1.5x scale

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.