Home / 143,440.29-215,015.13-72,147.51

Finding the Fourth Proportional to 143,440.29, 215,015.13 and 72,147.51

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Solution

The fourth proportional to 143,440.29, 215,015.13 and 72,147.51 is: 108,148.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,440.29 : 215,015.13 = 72,147.51 : x
  2. Step 2: Convert to fraction form
    143,440.29/215,015.13 = 72,147.51/x
  3. Step 3: Cross multiply
    143,440.29x = 215,015.13 × 72,147.51
  4. Step 4: Simplify right side
    143,440.29x = 15,512,806,241.83
  5. Step 5: Solve for x
    x = 15,512,806,241.83/143,440.29
  6. Step 6: Final answer
    x = 108,148.18

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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.