Home / 158,131.05-218,226-90,146.76

Finding the Fourth Proportional to 158,131.05, 218,226 and 90,146.76

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Solution

The fourth proportional to 158,131.05, 218,226 and 90,146.76 is: 124,405.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,131.05 : 218,226 = 90,146.76 : x
  2. Step 2: Convert to fraction form
    158,131.05/218,226 = 90,146.76/x
  3. Step 3: Cross multiply
    158,131.05x = 218,226 × 90,146.76
  4. Step 4: Simplify right side
    158,131.05x = 19,672,366,847.76
  5. Step 5: Solve for x
    x = 19,672,366,847.76/158,131.05
  6. Step 6: Final answer
    x = 124,405.47

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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.