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Finding the Fourth Proportional to 143,585.67, 215,378.45 and 38,401.91

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Solution

The fourth proportional to 143,585.67, 215,378.45 and 38,401.91 is: 57,602.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,585.67 : 215,378.45 = 38,401.91 : x
  2. Step 2: Convert to fraction form
    143,585.67/215,378.45 = 38,401.91/x
  3. Step 3: Cross multiply
    143,585.67x = 215,378.45 × 38,401.91
  4. Step 4: Simplify right side
    143,585.67x = 8,270,942,583.94
  5. Step 5: Solve for x
    x = 8,270,942,583.94/143,585.67
  6. Step 6: Final answer
    x = 57,602.84

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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.