Home / 90,712.89-136,115.37-40,782.87

Finding the Fourth Proportional to 90,712.89, 136,115.37 and 40,782.87

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Solution

The fourth proportional to 90,712.89, 136,115.37 and 40,782.87 is: 61,195.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,712.89 : 136,115.37 = 40,782.87 : x
  2. Step 2: Convert to fraction form
    90,712.89/136,115.37 = 40,782.87/x
  3. Step 3: Cross multiply
    90,712.89x = 136,115.37 × 40,782.87
  4. Step 4: Simplify right side
    90,712.89x = 5,551,175,439.71
  5. Step 5: Solve for x
    x = 5,551,175,439.71/90,712.89
  6. Step 6: Final answer
    x = 61,195.00

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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.