Home / 143,438.20-215,157.30-103,809.40

Finding the Fourth Proportional to 143,438.20, 215,157.30 and 103,809.40

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Solution

The fourth proportional to 143,438.20, 215,157.30 and 103,809.40 is: 155,714.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,438.20 : 215,157.30 = 103,809.40 : x
  2. Step 2: Convert to fraction form
    143,438.20/215,157.30 = 103,809.40/x
  3. Step 3: Cross multiply
    143,438.20x = 215,157.30 × 103,809.40
  4. Step 4: Simplify right side
    143,438.20x = 22,335,350,218.62
  5. Step 5: Solve for x
    x = 22,335,350,218.62/143,438.20
  6. Step 6: Final answer
    x = 155,714.10

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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.