Home / 75,120.71-103,114.19-66,432.51

Finding the Fourth Proportional to 75,120.71, 103,114.19 and 66,432.51

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Solution

The fourth proportional to 75,120.71, 103,114.19 and 66,432.51 is: 91,188.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,120.71 : 103,114.19 = 66,432.51 : x
  2. Step 2: Convert to fraction form
    75,120.71/103,114.19 = 66,432.51/x
  3. Step 3: Cross multiply
    75,120.71x = 103,114.19 × 66,432.51
  4. Step 4: Simplify right side
    75,120.71x = 6,850,134,624.40
  5. Step 5: Solve for x
    x = 6,850,134,624.40/75,120.71
  6. Step 6: Final answer
    x = 91,188.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.