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Finding the Fourth Proportional to 243,012.80, 364,519.20 and 136,287.20

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Solution

The fourth proportional to 243,012.80, 364,519.20 and 136,287.20 is: 204,430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,012.80 : 364,519.20 = 136,287.20 : x
  2. Step 2: Convert to fraction form
    243,012.80/364,519.20 = 136,287.20/x
  3. Step 3: Cross multiply
    243,012.80x = 364,519.20 × 136,287.20
  4. Step 4: Simplify right side
    243,012.80x = 49,679,301,114.24
  5. Step 5: Solve for x
    x = 49,679,301,114.24/243,012.80
  6. Step 6: Final answer
    x = 204,430.80

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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.