Home / 143,905.10-215,566.05-81,502.70

Finding the Fourth Proportional to 143,905.10, 215,566.05 and 81,502.70

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Solution

The fourth proportional to 143,905.10, 215,566.05 and 81,502.70 is: 122,088.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,905.10 : 215,566.05 = 81,502.70 : x
  2. Step 2: Convert to fraction form
    143,905.10/215,566.05 = 81,502.70/x
  3. Step 3: Cross multiply
    143,905.10x = 215,566.05 × 81,502.70
  4. Step 4: Simplify right side
    143,905.10x = 17,569,215,103.34
  5. Step 5: Solve for x
    x = 17,569,215,103.34/143,905.10
  6. Step 6: Final answer
    x = 122,088.90

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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.