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Finding the Fourth Proportional to 57,132.60, 85,698.90 and 42,406.80

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Solution

The fourth proportional to 57,132.60, 85,698.90 and 42,406.80 is: 63,610.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,132.60 : 85,698.90 = 42,406.80 : x
  2. Step 2: Convert to fraction form
    57,132.60/85,698.90 = 42,406.80/x
  3. Step 3: Cross multiply
    57,132.60x = 85,698.90 × 42,406.80
  4. Step 4: Simplify right side
    57,132.60x = 3,634,216,112.52
  5. Step 5: Solve for x
    x = 3,634,216,112.52/57,132.60
  6. Step 6: Final answer
    x = 63,610.20

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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.