Home / 81,390.34-112,357.56-54,211.63

Finding the Fourth Proportional to 81,390.34, 112,357.56 and 54,211.63

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Solution

The fourth proportional to 81,390.34, 112,357.56 and 54,211.63 is: 74,837.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,390.34 : 112,357.56 = 54,211.63 : x
  2. Step 2: Convert to fraction form
    81,390.34/112,357.56 = 54,211.63/x
  3. Step 3: Cross multiply
    81,390.34x = 112,357.56 × 54,211.63
  4. Step 4: Simplify right side
    81,390.34x = 6,091,086,470.42
  5. Step 5: Solve for x
    x = 6,091,086,470.42/81,390.34
  6. Step 6: Final answer
    x = 74,837.95

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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.