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Finding the Fourth Proportional to 243,668.66, 365,486.51 and 85,876.61

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Solution

The fourth proportional to 243,668.66, 365,486.51 and 85,876.61 is: 128,809.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,668.66 : 365,486.51 = 85,876.61 : x
  2. Step 2: Convert to fraction form
    243,668.66/365,486.51 = 85,876.61/x
  3. Step 3: Cross multiply
    243,668.66x = 365,486.51 × 85,876.61
  4. Step 4: Simplify right side
    243,668.66x = 31,386,740,866.79
  5. Step 5: Solve for x
    x = 31,386,740,866.79/243,668.66
  6. Step 6: Final answer
    x = 128,809.10

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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.