Home / 90,749.57-136,106.33-86,248.80

Finding the Fourth Proportional to 90,749.57, 136,106.33 and 86,248.80

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Solution

The fourth proportional to 90,749.57, 136,106.33 and 86,248.80 is: 129,356.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,749.57 : 136,106.33 = 86,248.80 : x
  2. Step 2: Convert to fraction form
    90,749.57/136,106.33 = 86,248.80/x
  3. Step 3: Cross multiply
    90,749.57x = 136,106.33 × 86,248.80
  4. Step 4: Simplify right side
    90,749.57x = 11,739,007,203.66
  5. Step 5: Solve for x
    x = 11,739,007,203.66/90,749.57
  6. Step 6: Final answer
    x = 129,356.07

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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.