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Finding the Fourth Proportional to 56,728.60, 85,092.90 and 42,002.80

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Solution

The fourth proportional to 56,728.60, 85,092.90 and 42,002.80 is: 63,004.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,728.60 : 85,092.90 = 42,002.80 : x
  2. Step 2: Convert to fraction form
    56,728.60/85,092.90 = 42,002.80/x
  3. Step 3: Cross multiply
    56,728.60x = 85,092.90 × 42,002.80
  4. Step 4: Simplify right side
    56,728.60x = 3,574,140,060.12
  5. Step 5: Solve for x
    x = 3,574,140,060.12/56,728.60
  6. Step 6: Final answer
    x = 63,004.20

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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.