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Finding the Fourth Proportional to 97,246.80, 145,870.20 and 91,341.90

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Solution

The fourth proportional to 97,246.80, 145,870.20 and 91,341.90 is: 137,012.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,246.80 : 145,870.20 = 91,341.90 : x
  2. Step 2: Convert to fraction form
    97,246.80/145,870.20 = 91,341.90/x
  3. Step 3: Cross multiply
    97,246.80x = 145,870.20 × 91,341.90
  4. Step 4: Simplify right side
    97,246.80x = 13,324,061,221.38
  5. Step 5: Solve for x
    x = 13,324,061,221.38/97,246.80
  6. Step 6: Final answer
    x = 137,012.85

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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.