Home / 113,128.38-156,170.22-65,372.40

Finding the Fourth Proportional to 113,128.38, 156,170.22 and 65,372.40

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Solution

The fourth proportional to 113,128.38, 156,170.22 and 65,372.40 is: 90,244.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,128.38 : 156,170.22 = 65,372.40 : x
  2. Step 2: Convert to fraction form
    113,128.38/156,170.22 = 65,372.40/x
  3. Step 3: Cross multiply
    113,128.38x = 156,170.22 × 65,372.40
  4. Step 4: Simplify right side
    113,128.38x = 10,209,222,089.93
  5. Step 5: Solve for x
    x = 10,209,222,089.93/113,128.38
  6. Step 6: Final answer
    x = 90,244.57

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1.5x scale

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.