Home / 142,408.20-213,381.90-89,723.40

Finding the Fourth Proportional to 142,408.20, 213,381.90 and 89,723.40

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Solution

The fourth proportional to 142,408.20, 213,381.90 and 89,723.40 is: 134,439.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,408.20 : 213,381.90 = 89,723.40 : x
  2. Step 2: Convert to fraction form
    142,408.20/213,381.90 = 89,723.40/x
  3. Step 3: Cross multiply
    142,408.20x = 213,381.90 × 89,723.40
  4. Step 4: Simplify right side
    142,408.20x = 19,145,349,566.46
  5. Step 5: Solve for x
    x = 19,145,349,566.46/142,408.20
  6. Step 6: Final answer
    x = 134,439.94

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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.