Home / 90,763.89-136,158.80-28,439.25

Finding the Fourth Proportional to 90,763.89, 136,158.80 and 28,439.25

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Solution

The fourth proportional to 90,763.89, 136,158.80 and 28,439.25 is: 42,662.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,763.89 : 136,158.80 = 28,439.25 : x
  2. Step 2: Convert to fraction form
    90,763.89/136,158.80 = 28,439.25/x
  3. Step 3: Cross multiply
    90,763.89x = 136,158.80 × 28,439.25
  4. Step 4: Simplify right side
    90,763.89x = 3,872,254,010.70
  5. Step 5: Solve for x
    x = 3,872,254,010.70/90,763.89
  6. Step 6: Final answer
    x = 42,662.94

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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.