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Finding the Fourth Proportional to 158,467.55, 218,588.06 and 129,438.09

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Solution

The fourth proportional to 158,467.55, 218,588.06 and 129,438.09 is: 178,545.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,467.55 : 218,588.06 = 129,438.09 : x
  2. Step 2: Convert to fraction form
    158,467.55/218,588.06 = 129,438.09/x
  3. Step 3: Cross multiply
    158,467.55x = 218,588.06 × 129,438.09
  4. Step 4: Simplify right side
    158,467.55x = 28,293,621,306.80
  5. Step 5: Solve for x
    x = 28,293,621,306.80/158,467.55
  6. Step 6: Final answer
    x = 178,545.21

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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.