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Finding the Fourth Proportional to 137,215.60, 205,839.40 and 43,730.80

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Solution

The fourth proportional to 137,215.60, 205,839.40 and 43,730.80 is: 65,601.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,215.60 : 205,839.40 = 43,730.80 : x
  2. Step 2: Convert to fraction form
    137,215.60/205,839.40 = 43,730.80/x
  3. Step 3: Cross multiply
    137,215.60x = 205,839.40 × 43,730.80
  4. Step 4: Simplify right side
    137,215.60x = 9,001,521,633.52
  5. Step 5: Solve for x
    x = 9,001,521,633.52/137,215.60
  6. Step 6: Final answer
    x = 65,601.30

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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.