Home / 74,221.56-102,425.64-40,689.72

Finding the Fourth Proportional to 74,221.56, 102,425.64 and 40,689.72

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Solution

The fourth proportional to 74,221.56, 102,425.64 and 40,689.72 is: 56,151.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,221.56 : 102,425.64 = 40,689.72 : x
  2. Step 2: Convert to fraction form
    74,221.56/102,425.64 = 40,689.72/x
  3. Step 3: Cross multiply
    74,221.56x = 102,425.64 × 40,689.72
  4. Step 4: Simplify right side
    74,221.56x = 4,167,670,612.42
  5. Step 5: Solve for x
    x = 4,167,670,612.42/74,221.56
  6. Step 6: Final answer
    x = 56,151.75

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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.