Home / 155,760.84-215,021.73-91,221.11

Finding the Fourth Proportional to 155,760.84, 215,021.73 and 91,221.11

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Solution

The fourth proportional to 155,760.84, 215,021.73 and 91,221.11 is: 125,927.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,760.84 : 215,021.73 = 91,221.11 : x
  2. Step 2: Convert to fraction form
    155,760.84/215,021.73 = 91,221.11/x
  3. Step 3: Cross multiply
    155,760.84x = 215,021.73 × 91,221.11
  4. Step 4: Simplify right side
    155,760.84x = 19,614,519,809.61
  5. Step 5: Solve for x
    x = 19,614,519,809.61/155,760.84
  6. Step 6: Final answer
    x = 125,927.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.