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Finding the Fourth Proportional to 170,000.55, 255,056.27 and 81,261

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Solution

The fourth proportional to 170,000.55, 255,056.27 and 81,261 is: 121,918.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,000.55 : 255,056.27 = 81,261 : x
  2. Step 2: Convert to fraction form
    170,000.55/255,056.27 = 81,261/x
  3. Step 3: Cross multiply
    170,000.55x = 255,056.27 × 81,261
  4. Step 4: Simplify right side
    170,000.55x = 20,726,127,150.17
  5. Step 5: Solve for x
    x = 20,726,127,150.17/170,000.55
  6. Step 6: Final answer
    x = 121,918.00

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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.