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Finding the Fourth Proportional to 74,394, 102,663.72 and 40,862.16

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Solution

The fourth proportional to 74,394, 102,663.72 and 40,862.16 is: 56,389.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,394 : 102,663.72 = 40,862.16 : x
  2. Step 2: Convert to fraction form
    74,394/102,663.72 = 40,862.16/x
  3. Step 3: Cross multiply
    74,394x = 102,663.72 × 40,862.16
  4. Step 4: Simplify right side
    74,394x = 4,195,061,352.84
  5. Step 5: Solve for x
    x = 4,195,061,352.84/74,394
  6. Step 6: Final answer
    x = 56,389.78

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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.