Home / 81,288.72-121,926.18-27,976.32

Finding the Fourth Proportional to 81,288.72, 121,926.18 and 27,976.32

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Solution

The fourth proportional to 81,288.72, 121,926.18 and 27,976.32 is: 41,962.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,288.72 : 121,926.18 = 27,976.32 : x
  2. Step 2: Convert to fraction form
    81,288.72/121,926.18 = 27,976.32/x
  3. Step 3: Cross multiply
    81,288.72x = 121,926.18 × 27,976.32
  4. Step 4: Simplify right side
    81,288.72x = 3,411,045,828.06
  5. Step 5: Solve for x
    x = 3,411,045,828.06/81,288.72
  6. Step 6: Final answer
    x = 41,962.11

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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.