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Finding the Fourth Proportional to 261,044.37, 391,570.20 and 74,055.87

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Solution

The fourth proportional to 261,044.37, 391,570.20 and 74,055.87 is: 111,084.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,044.37 : 391,570.20 = 74,055.87 : x
  2. Step 2: Convert to fraction form
    261,044.37/391,570.20 = 74,055.87/x
  3. Step 3: Cross multiply
    261,044.37x = 391,570.20 × 74,055.87
  4. Step 4: Simplify right side
    261,044.37x = 28,998,071,827.07
  5. Step 5: Solve for x
    x = 28,998,071,827.07/261,044.37
  6. Step 6: Final answer
    x = 111,084.84

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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.