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Finding the Fourth Proportional to 143,615.58, 215,423.20 and 38,431.81

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Solution

The fourth proportional to 143,615.58, 215,423.20 and 38,431.81 is: 57,647.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,615.58 : 215,423.20 = 38,431.81 : x
  2. Step 2: Convert to fraction form
    143,615.58/215,423.20 = 38,431.81/x
  3. Step 3: Cross multiply
    143,615.58x = 215,423.20 × 38,431.81
  4. Step 4: Simplify right side
    143,615.58x = 8,279,103,491.99
  5. Step 5: Solve for x
    x = 8,279,103,491.99/143,615.58
  6. Step 6: Final answer
    x = 57,647.67

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1.5x scale

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.