Home / 77,689.11-107,617.01-76,114.47

Finding the Fourth Proportional to 77,689.11, 107,617.01 and 76,114.47

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Solution

The fourth proportional to 77,689.11, 107,617.01 and 76,114.47 is: 105,435.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,689.11 : 107,617.01 = 76,114.47 : x
  2. Step 2: Convert to fraction form
    77,689.11/107,617.01 = 76,114.47/x
  3. Step 3: Cross multiply
    77,689.11x = 107,617.01 × 76,114.47
  4. Step 4: Simplify right side
    77,689.11x = 8,191,211,869.42
  5. Step 5: Solve for x
    x = 8,191,211,869.42/77,689.11
  6. Step 6: Final answer
    x = 105,435.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.