Home / 143,747.52-198,389.12-87,158.72

Finding the Fourth Proportional to 143,747.52, 198,389.12 and 87,158.72

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Solution

The fourth proportional to 143,747.52, 198,389.12 and 87,158.72 is: 120,289.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,747.52 : 198,389.12 = 87,158.72 : x
  2. Step 2: Convert to fraction form
    143,747.52/198,389.12 = 87,158.72/x
  3. Step 3: Cross multiply
    143,747.52x = 198,389.12 × 87,158.72
  4. Step 4: Simplify right side
    143,747.52x = 17,291,341,761.13
  5. Step 5: Solve for x
    x = 17,291,341,761.13/143,747.52
  6. Step 6: Final answer
    x = 120,289.67

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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.