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Finding the Fourth Proportional to 74,436, 102,721.68 and 40,904.16

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Solution

The fourth proportional to 74,436, 102,721.68 and 40,904.16 is: 56,447.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,436 : 102,721.68 = 40,904.16 : x
  2. Step 2: Convert to fraction form
    74,436/102,721.68 = 40,904.16/x
  3. Step 3: Cross multiply
    74,436x = 102,721.68 × 40,904.16
  4. Step 4: Simplify right side
    74,436x = 4,201,744,034.19
  5. Step 5: Solve for x
    x = 4,201,744,034.19/74,436
  6. Step 6: Final answer
    x = 56,447.74

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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.