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Finding the Fourth Proportional to 158,418.66, 218,609.39 and 90,432.93

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Solution

The fourth proportional to 158,418.66, 218,609.39 and 90,432.93 is: 124,792.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,418.66 : 218,609.39 = 90,432.93 : x
  2. Step 2: Convert to fraction form
    158,418.66/218,609.39 = 90,432.93/x
  3. Step 3: Cross multiply
    158,418.66x = 218,609.39 × 90,432.93
  4. Step 4: Simplify right side
    158,418.66x = 19,769,487,211.05
  5. Step 5: Solve for x
    x = 19,769,487,211.05/158,418.66
  6. Step 6: Final answer
    x = 124,792.67

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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.