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Finding the Fourth Proportional to 174,599.80, 261,726.90 and 85,780.60

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Solution

The fourth proportional to 174,599.80, 261,726.90 and 85,780.60 is: 128,586.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,599.80 : 261,726.90 = 85,780.60 : x
  2. Step 2: Convert to fraction form
    174,599.80/261,726.90 = 85,780.60/x
  3. Step 3: Cross multiply
    174,599.80x = 261,726.90 × 85,780.60
  4. Step 4: Simplify right side
    174,599.80x = 22,451,090,518.14
  5. Step 5: Solve for x
    x = 22,451,090,518.14/174,599.80
  6. Step 6: Final answer
    x = 128,586.00

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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.