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Finding the Fourth Proportional to 56,686.40, 85,029.60 and 39,773.60

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Solution

The fourth proportional to 56,686.40, 85,029.60 and 39,773.60 is: 59,660.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,686.40 : 85,029.60 = 39,773.60 : x
  2. Step 2: Convert to fraction form
    56,686.40/85,029.60 = 39,773.60/x
  3. Step 3: Cross multiply
    56,686.40x = 85,029.60 × 39,773.60
  4. Step 4: Simplify right side
    56,686.40x = 3,381,933,298.56
  5. Step 5: Solve for x
    x = 3,381,933,298.56/56,686.40
  6. Step 6: Final answer
    x = 59,660.40

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1.5x scale

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.