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Finding the Fourth Proportional to 143,960.10, 215,940.15 and 86,879.40

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Solution

The fourth proportional to 143,960.10, 215,940.15 and 86,879.40 is: 130,319.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,960.10 : 215,940.15 = 86,879.40 : x
  2. Step 2: Convert to fraction form
    143,960.10/215,940.15 = 86,879.40/x
  3. Step 3: Cross multiply
    143,960.10x = 215,940.15 × 86,879.40
  4. Step 4: Simplify right side
    143,960.10x = 18,760,750,667.91
  5. Step 5: Solve for x
    x = 18,760,750,667.91/143,960.10
  6. Step 6: Final answer
    x = 130,319.10

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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.