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Finding the Fourth Proportional to 57,320.40, 85,980.60 and 54,258.60

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Solution

The fourth proportional to 57,320.40, 85,980.60 and 54,258.60 is: 81,387.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,320.40 : 85,980.60 = 54,258.60 : x
  2. Step 2: Convert to fraction form
    57,320.40/85,980.60 = 54,258.60/x
  3. Step 3: Cross multiply
    57,320.40x = 85,980.60 × 54,258.60
  4. Step 4: Simplify right side
    57,320.40x = 4,665,186,983.16
  5. Step 5: Solve for x
    x = 4,665,186,983.16/57,320.40
  6. Step 6: Final answer
    x = 81,387.90

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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.