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Finding the Fourth Proportional to 54,657.55, 81,986.36 and 42,195.78

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Solution

The fourth proportional to 54,657.55, 81,986.36 and 42,195.78 is: 63,293.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,657.55 : 81,986.36 = 42,195.78 : x
  2. Step 2: Convert to fraction form
    54,657.55/81,986.36 = 42,195.78/x
  3. Step 3: Cross multiply
    54,657.55x = 81,986.36 × 42,195.78
  4. Step 4: Simplify right side
    54,657.55x = 3,459,478,409.56
  5. Step 5: Solve for x
    x = 3,459,478,409.56/54,657.55
  6. Step 6: Final answer
    x = 63,293.70

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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.