Home / 153,891.20-212,381.52-90,264.08

Finding the Fourth Proportional to 153,891.20, 212,381.52 and 90,264.08

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Solution

The fourth proportional to 153,891.20, 212,381.52 and 90,264.08 is: 124,571.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,891.20 : 212,381.52 = 90,264.08 : x
  2. Step 2: Convert to fraction form
    153,891.20/212,381.52 = 90,264.08/x
  3. Step 3: Cross multiply
    153,891.20x = 212,381.52 × 90,264.08
  4. Step 4: Simplify right side
    153,891.20x = 19,170,422,511.80
  5. Step 5: Solve for x
    x = 19,170,422,511.80/153,891.20
  6. Step 6: Final answer
    x = 124,571.27

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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.