Home / 154,101.78-212,655.62-90,438.22

Finding the Fourth Proportional to 154,101.78, 212,655.62 and 90,438.22

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Solution

The fourth proportional to 154,101.78, 212,655.62 and 90,438.22 is: 124,801.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,101.78 : 212,655.62 = 90,438.22 : x
  2. Step 2: Convert to fraction form
    154,101.78/212,655.62 = 90,438.22/x
  3. Step 3: Cross multiply
    154,101.78x = 212,655.62 × 90,438.22
  4. Step 4: Simplify right side
    154,101.78x = 19,232,195,745.80
  5. Step 5: Solve for x
    x = 19,232,195,745.80/154,101.78
  6. Step 6: Final answer
    x = 124,801.91

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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.