Home / 81,055.32-121,595.18-28,455.56

Finding the Fourth Proportional to 81,055.32, 121,595.18 and 28,455.56

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Solution

The fourth proportional to 81,055.32, 121,595.18 and 28,455.56 is: 42,687.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,055.32 : 121,595.18 = 28,455.56 : x
  2. Step 2: Convert to fraction form
    81,055.32/121,595.18 = 28,455.56/x
  3. Step 3: Cross multiply
    81,055.32x = 121,595.18 × 28,455.56
  4. Step 4: Simplify right side
    81,055.32x = 3,460,058,940.20
  5. Step 5: Solve for x
    x = 3,460,058,940.20/81,055.32
  6. Step 6: Final answer
    x = 42,687.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.