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Finding the Fourth Proportional to 90,991.62, 125,521.65 and 59,148.90

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Solution

The fourth proportional to 90,991.62, 125,521.65 and 59,148.90 is: 81,595.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,991.62 : 125,521.65 = 59,148.90 : x
  2. Step 2: Convert to fraction form
    90,991.62/125,521.65 = 59,148.90/x
  3. Step 3: Cross multiply
    90,991.62x = 125,521.65 × 59,148.90
  4. Step 4: Simplify right side
    90,991.62x = 7,424,467,523.69
  5. Step 5: Solve for x
    x = 7,424,467,523.69/90,991.62
  6. Step 6: Final answer
    x = 81,595.07

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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.