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Finding the Fourth Proportional to 64,947.80, 97,421.70 and 61,059.80

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Solution

The fourth proportional to 64,947.80, 97,421.70 and 61,059.80 is: 91,589.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,947.80 : 97,421.70 = 61,059.80 : x
  2. Step 2: Convert to fraction form
    64,947.80/97,421.70 = 61,059.80/x
  3. Step 3: Cross multiply
    64,947.80x = 97,421.70 × 61,059.80
  4. Step 4: Simplify right side
    64,947.80x = 5,948,549,517.66
  5. Step 5: Solve for x
    x = 5,948,549,517.66/64,947.80
  6. Step 6: Final answer
    x = 91,589.70

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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.