Home / 212,115.98-292,721.01-115,320.78

Finding the Fourth Proportional to 212,115.98, 292,721.01 and 115,320.78

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Solution

The fourth proportional to 212,115.98, 292,721.01 and 115,320.78 is: 159,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,115.98 : 292,721.01 = 115,320.78 : x
  2. Step 2: Convert to fraction form
    212,115.98/292,721.01 = 115,320.78/x
  3. Step 3: Cross multiply
    212,115.98x = 292,721.01 × 115,320.78
  4. Step 4: Simplify right side
    212,115.98x = 33,756,815,195.59
  5. Step 5: Solve for x
    x = 33,756,815,195.59/212,115.98
  6. Step 6: Final answer
    x = 159,143.20

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1.5x scale

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.