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Finding the Fourth Proportional to 158,357.70, 218,521.80 and 90,372.78

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Solution

The fourth proportional to 158,357.70, 218,521.80 and 90,372.78 is: 124,707.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,357.70 : 218,521.80 = 90,372.78 : x
  2. Step 2: Convert to fraction form
    158,357.70/218,521.80 = 90,372.78/x
  3. Step 3: Cross multiply
    158,357.70x = 218,521.80 × 90,372.78
  4. Step 4: Simplify right side
    158,357.70x = 19,748,422,556.60
  5. Step 5: Solve for x
    x = 19,748,422,556.60/158,357.70
  6. Step 6: Final answer
    x = 124,707.69

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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.