Home / 90,422.51-135,641.13-45,420.71

Finding the Fourth Proportional to 90,422.51, 135,641.13 and 45,420.71

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Solution

The fourth proportional to 90,422.51, 135,641.13 and 45,420.71 is: 68,134.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,422.51 : 135,641.13 = 45,420.71 : x
  2. Step 2: Convert to fraction form
    90,422.51/135,641.13 = 45,420.71/x
  3. Step 3: Cross multiply
    90,422.51x = 135,641.13 × 45,420.71
  4. Step 4: Simplify right side
    90,422.51x = 6,160,915,751.60
  5. Step 5: Solve for x
    x = 6,160,915,751.60/90,422.51
  6. Step 6: Final answer
    x = 68,134.76

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1.5x scale

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.