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Finding the Fourth Proportional to 92,281.20, 138,421.80 and 62,756.70

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Solution

The fourth proportional to 92,281.20, 138,421.80 and 62,756.70 is: 94,135.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,281.20 : 138,421.80 = 62,756.70 : x
  2. Step 2: Convert to fraction form
    92,281.20/138,421.80 = 62,756.70/x
  3. Step 3: Cross multiply
    92,281.20x = 138,421.80 × 62,756.70
  4. Step 4: Simplify right side
    92,281.20x = 8,686,895,376.06
  5. Step 5: Solve for x
    x = 8,686,895,376.06/92,281.20
  6. Step 6: Final answer
    x = 94,135.05

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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.