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Finding the Fourth Proportional to 61,885.61, 85,358.03 and 56,797.55

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Solution

The fourth proportional to 61,885.61, 85,358.03 and 56,797.55 is: 78,340.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,885.61 : 85,358.03 = 56,797.55 : x
  2. Step 2: Convert to fraction form
    61,885.61/85,358.03 = 56,797.55/x
  3. Step 3: Cross multiply
    61,885.61x = 85,358.03 × 56,797.55
  4. Step 4: Simplify right side
    61,885.61x = 4,848,126,266.05
  5. Step 5: Solve for x
    x = 4,848,126,266.05/61,885.61
  6. Step 6: Final answer
    x = 78,340.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.