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Finding the Fourth Proportional to 185,563.80, 278,345.70 and 80,587.80

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Solution

The fourth proportional to 185,563.80, 278,345.70 and 80,587.80 is: 120,881.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,563.80 : 278,345.70 = 80,587.80 : x
  2. Step 2: Convert to fraction form
    185,563.80/278,345.70 = 80,587.80/x
  3. Step 3: Cross multiply
    185,563.80x = 278,345.70 × 80,587.80
  4. Step 4: Simplify right side
    185,563.80x = 22,431,267,602.46
  5. Step 5: Solve for x
    x = 22,431,267,602.46/185,563.80
  6. Step 6: Final answer
    x = 120,881.70

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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.