Home / 81,130.08-111,832.50-74,612.82

Finding the Fourth Proportional to 81,130.08, 111,832.50 and 74,612.82

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Solution

The fourth proportional to 81,130.08, 111,832.50 and 74,612.82 is: 102,848.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,130.08 : 111,832.50 = 74,612.82 : x
  2. Step 2: Convert to fraction form
    81,130.08/111,832.50 = 74,612.82/x
  3. Step 3: Cross multiply
    81,130.08x = 111,832.50 × 74,612.82
  4. Step 4: Simplify right side
    81,130.08x = 8,344,138,192.65
  5. Step 5: Solve for x
    x = 8,344,138,192.65/81,130.08
  6. Step 6: Final answer
    x = 102,848.88

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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.