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Finding the Fourth Proportional to 113,126.88, 156,168.16 and 65,370.90

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Solution

The fourth proportional to 113,126.88, 156,168.16 and 65,370.90 is: 90,242.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,126.88 : 156,168.16 = 65,370.90 : x
  2. Step 2: Convert to fraction form
    113,126.88/156,168.16 = 65,370.90/x
  3. Step 3: Cross multiply
    113,126.88x = 156,168.16 × 65,370.90
  4. Step 4: Simplify right side
    113,126.88x = 10,208,853,170.54
  5. Step 5: Solve for x
    x = 10,208,853,170.54/113,126.88
  6. Step 6: Final answer
    x = 90,242.51

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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.