Home / 74,436.20-102,720.71-40,445.21

Finding the Fourth Proportional to 74,436.20, 102,720.71 and 40,445.21

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Solution

The fourth proportional to 74,436.20, 102,720.71 and 40,445.21 is: 55,813.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,436.20 : 102,720.71 = 40,445.21 : x
  2. Step 2: Convert to fraction form
    74,436.20/102,720.71 = 40,445.21/x
  3. Step 3: Cross multiply
    74,436.20x = 102,720.71 × 40,445.21
  4. Step 4: Simplify right side
    74,436.20x = 4,154,561,045.21
  5. Step 5: Solve for x
    x = 4,154,561,045.21/74,436.20
  6. Step 6: Final answer
    x = 55,813.72

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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.