Home / 153,729.20-212,177.40-90,121.52

Finding the Fourth Proportional to 153,729.20, 212,177.40 and 90,121.52

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Solution

The fourth proportional to 153,729.20, 212,177.40 and 90,121.52 is: 124,385.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,729.20 : 212,177.40 = 90,121.52 : x
  2. Step 2: Convert to fraction form
    153,729.20/212,177.40 = 90,121.52/x
  3. Step 3: Cross multiply
    153,729.20x = 212,177.40 × 90,121.52
  4. Step 4: Simplify right side
    153,729.20x = 19,121,749,797.65
  5. Step 5: Solve for x
    x = 19,121,749,797.65/153,729.20
  6. Step 6: Final answer
    x = 124,385.93

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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.