Home / 90,761.76-136,157.28-38,186.28

Finding the Fourth Proportional to 90,761.76, 136,157.28 and 38,186.28

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Solution

The fourth proportional to 90,761.76, 136,157.28 and 38,186.28 is: 57,285.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,761.76 : 136,157.28 = 38,186.28 : x
  2. Step 2: Convert to fraction form
    90,761.76/136,157.28 = 38,186.28/x
  3. Step 3: Cross multiply
    90,761.76x = 136,157.28 × 38,186.28
  4. Step 4: Simplify right side
    90,761.76x = 5,199,340,018.12
  5. Step 5: Solve for x
    x = 5,199,340,018.12/90,761.76
  6. Step 6: Final answer
    x = 57,285.58

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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.