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Finding the Fourth Proportional to 158,378.59, 218,518.90 and 90,371.09

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Solution

The fourth proportional to 158,378.59, 218,518.90 and 90,371.09 is: 124,687.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,378.59 : 218,518.90 = 90,371.09 : x
  2. Step 2: Convert to fraction form
    158,378.59/218,518.90 = 90,371.09/x
  3. Step 3: Cross multiply
    158,378.59x = 218,518.90 × 90,371.09
  4. Step 4: Simplify right side
    158,378.59x = 19,747,791,178.60
  5. Step 5: Solve for x
    x = 19,747,791,178.60/158,378.59
  6. Step 6: Final answer
    x = 124,687.25

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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.