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Finding the Fourth Proportional to 74,916.80, 112,375.20 and 48,305.60

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Solution

The fourth proportional to 74,916.80, 112,375.20 and 48,305.60 is: 72,458.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,916.80 : 112,375.20 = 48,305.60 : x
  2. Step 2: Convert to fraction form
    74,916.80/112,375.20 = 48,305.60/x
  3. Step 3: Cross multiply
    74,916.80x = 112,375.20 × 48,305.60
  4. Step 4: Simplify right side
    74,916.80x = 5,428,351,461.12
  5. Step 5: Solve for x
    x = 5,428,351,461.12/74,916.80
  6. Step 6: Final answer
    x = 72,458.40

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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.