Home / 154,211.85-212,789.84-90,570.15

Finding the Fourth Proportional to 154,211.85, 212,789.84 and 90,570.15

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Solution

The fourth proportional to 154,211.85, 212,789.84 and 90,570.15 is: 124,973.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,211.85 : 212,789.84 = 90,570.15 : x
  2. Step 2: Convert to fraction form
    154,211.85/212,789.84 = 90,570.15/x
  3. Step 3: Cross multiply
    154,211.85x = 212,789.84 × 90,570.15
  4. Step 4: Simplify right side
    154,211.85x = 19,272,407,274.43
  5. Step 5: Solve for x
    x = 19,272,407,274.43/154,211.85
  6. Step 6: Final answer
    x = 124,973.58

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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.