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Finding the Fourth Proportional to 137,228.70, 205,972.65 and 84,740.70

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Solution

The fourth proportional to 137,228.70, 205,972.65 and 84,740.70 is: 127,191.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,228.70 : 205,972.65 = 84,740.70 : x
  2. Step 2: Convert to fraction form
    137,228.70/205,972.65 = 84,740.70/x
  3. Step 3: Cross multiply
    137,228.70x = 205,972.65 × 84,740.70
  4. Step 4: Simplify right side
    137,228.70x = 17,454,266,541.86
  5. Step 5: Solve for x
    x = 17,454,266,541.86/137,228.70
  6. Step 6: Final answer
    x = 127,191.08

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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.