Home / 100,521.43-151,488.11-90,538.69

Finding the Fourth Proportional to 100,521.43, 151,488.11 and 90,538.69

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Solution

The fourth proportional to 100,521.43, 151,488.11 and 90,538.69 is: 136,443.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,521.43 : 151,488.11 = 90,538.69 : x
  2. Step 2: Convert to fraction form
    100,521.43/151,488.11 = 90,538.69/x
  3. Step 3: Cross multiply
    100,521.43x = 151,488.11 × 90,538.69
  4. Step 4: Simplify right side
    100,521.43x = 13,715,535,029.98
  5. Step 5: Solve for x
    x = 13,715,535,029.98/100,521.43
  6. Step 6: Final answer
    x = 136,443.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.