Home / 143,426.40-215,139.60-90,895.20

Finding the Fourth Proportional to 143,426.40, 215,139.60 and 90,895.20

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Solution

The fourth proportional to 143,426.40, 215,139.60 and 90,895.20 is: 136,342.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,426.40 : 215,139.60 = 90,895.20 : x
  2. Step 2: Convert to fraction form
    143,426.40/215,139.60 = 90,895.20/x
  3. Step 3: Cross multiply
    143,426.40x = 215,139.60 × 90,895.20
  4. Step 4: Simplify right side
    143,426.40x = 19,555,156,969.92
  5. Step 5: Solve for x
    x = 19,555,156,969.92/143,426.40
  6. Step 6: Final answer
    x = 136,342.80

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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.