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Finding the Fourth Proportional to 243,509.20, 336,041.71 and 136,079.20

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Solution

The fourth proportional to 243,509.20, 336,041.71 and 136,079.20 is: 187,788.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,509.20 : 336,041.71 = 136,079.20 : x
  2. Step 2: Convert to fraction form
    243,509.20/336,041.71 = 136,079.20/x
  3. Step 3: Cross multiply
    243,509.20x = 336,041.71 × 136,079.20
  4. Step 4: Simplify right side
    243,509.20x = 45,728,287,063.43
  5. Step 5: Solve for x
    x = 45,728,287,063.43/243,509.20
  6. Step 6: Final answer
    x = 187,788.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.