Home / 81,907.20-112,961.28-63,974.40

Finding the Fourth Proportional to 81,907.20, 112,961.28 and 63,974.40

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Solution

The fourth proportional to 81,907.20, 112,961.28 and 63,974.40 is: 88,229.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,907.20 : 112,961.28 = 63,974.40 : x
  2. Step 2: Convert to fraction form
    81,907.20/112,961.28 = 63,974.40/x
  3. Step 3: Cross multiply
    81,907.20x = 112,961.28 × 63,974.40
  4. Step 4: Simplify right side
    81,907.20x = 7,226,630,111.23
  5. Step 5: Solve for x
    x = 7,226,630,111.23/81,907.20
  6. Step 6: Final answer
    x = 88,229.49

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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.