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Finding the Fourth Proportional to 129,291.53, 193,521.76 and 69,169.98

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Solution

The fourth proportional to 129,291.53, 193,521.76 and 69,169.98 is: 103,532.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,291.53 : 193,521.76 = 69,169.98 : x
  2. Step 2: Convert to fraction form
    129,291.53/193,521.76 = 69,169.98/x
  3. Step 3: Cross multiply
    129,291.53x = 193,521.76 × 69,169.98
  4. Step 4: Simplify right side
    129,291.53x = 13,385,896,821.55
  5. Step 5: Solve for x
    x = 13,385,896,821.55/129,291.53
  6. Step 6: Final answer
    x = 103,532.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.