Home / 153,929.88-212,409.12-90,255.72

Finding the Fourth Proportional to 153,929.88, 212,409.12 and 90,255.72

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Solution

The fourth proportional to 153,929.88, 212,409.12 and 90,255.72 is: 124,544.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,929.88 : 212,409.12 = 90,255.72 : x
  2. Step 2: Convert to fraction form
    153,929.88/212,409.12 = 90,255.72/x
  3. Step 3: Cross multiply
    153,929.88x = 212,409.12 × 90,255.72
  4. Step 4: Simplify right side
    153,929.88x = 19,171,138,060.17
  5. Step 5: Solve for x
    x = 19,171,138,060.17/153,929.88
  6. Step 6: Final answer
    x = 124,544.62

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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.