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Finding the Fourth Proportional to 143,312.70, 214,969.05 and 80,327.10

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Solution

The fourth proportional to 143,312.70, 214,969.05 and 80,327.10 is: 120,490.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,312.70 : 214,969.05 = 80,327.10 : x
  2. Step 2: Convert to fraction form
    143,312.70/214,969.05 = 80,327.10/x
  3. Step 3: Cross multiply
    143,312.70x = 214,969.05 × 80,327.10
  4. Step 4: Simplify right side
    143,312.70x = 17,267,840,376.26
  5. Step 5: Solve for x
    x = 17,267,840,376.26/143,312.70
  6. Step 6: Final answer
    x = 120,490.65

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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.