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Finding the Fourth Proportional to 143,888.10, 215,832.15 and 80,643.30

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Solution

The fourth proportional to 143,888.10, 215,832.15 and 80,643.30 is: 120,964.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,888.10 : 215,832.15 = 80,643.30 : x
  2. Step 2: Convert to fraction form
    143,888.10/215,832.15 = 80,643.30/x
  3. Step 3: Cross multiply
    143,888.10x = 215,832.15 × 80,643.30
  4. Step 4: Simplify right side
    143,888.10x = 17,405,416,822.10
  5. Step 5: Solve for x
    x = 17,405,416,822.10/143,888.10
  6. Step 6: Final answer
    x = 120,964.95

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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.