Home / 91,410.20-136,823.70-71,581.40

Finding the Fourth Proportional to 91,410.20, 136,823.70 and 71,581.40

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Solution

The fourth proportional to 91,410.20, 136,823.70 and 71,581.40 is: 107,143.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,410.20 : 136,823.70 = 71,581.40 : x
  2. Step 2: Convert to fraction form
    91,410.20/136,823.70 = 71,581.40/x
  3. Step 3: Cross multiply
    91,410.20x = 136,823.70 × 71,581.40
  4. Step 4: Simplify right side
    91,410.20x = 9,794,031,999.18
  5. Step 5: Solve for x
    x = 9,794,031,999.18/91,410.20
  6. Step 6: Final answer
    x = 107,143.75

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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.