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Finding the Fourth Proportional to 61,937.98, 85,509.87 and 40,778.75

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Solution

The fourth proportional to 61,937.98, 85,509.87 and 40,778.75 is: 56,298.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,937.98 : 85,509.87 = 40,778.75 : x
  2. Step 2: Convert to fraction form
    61,937.98/85,509.87 = 40,778.75/x
  3. Step 3: Cross multiply
    61,937.98x = 85,509.87 × 40,778.75
  4. Step 4: Simplify right side
    61,937.98x = 3,486,985,611.26
  5. Step 5: Solve for x
    x = 3,486,985,611.26/61,937.98
  6. Step 6: Final answer
    x = 56,298.02

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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.