Home / 91,321.13-136,994.56-28,146.36

Finding the Fourth Proportional to 91,321.13, 136,994.56 and 28,146.36

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Solution

The fourth proportional to 91,321.13, 136,994.56 and 28,146.36 is: 42,223.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,321.13 : 136,994.56 = 28,146.36 : x
  2. Step 2: Convert to fraction form
    91,321.13/136,994.56 = 28,146.36/x
  3. Step 3: Cross multiply
    91,321.13x = 136,994.56 × 28,146.36
  4. Step 4: Simplify right side
    91,321.13x = 3,855,898,203.80
  5. Step 5: Solve for x
    x = 3,855,898,203.80/91,321.13
  6. Step 6: Final answer
    x = 42,223.51

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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.