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Finding the Fourth Proportional to 243,508.63, 336,041.13 and 136,078.66

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Solution

The fourth proportional to 243,508.63, 336,041.13 and 136,078.66 is: 187,788.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,508.63 : 336,041.13 = 136,078.66 : x
  2. Step 2: Convert to fraction form
    243,508.63/336,041.13 = 136,078.66/x
  3. Step 3: Cross multiply
    243,508.63x = 336,041.13 × 136,078.66
  4. Step 4: Simplify right side
    243,508.63x = 45,728,026,675.29
  5. Step 5: Solve for x
    x = 45,728,026,675.29/243,508.63
  6. Step 6: Final answer
    x = 187,788.12

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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.