Home / 81,713.10-112,777.20-76,376.82

Finding the Fourth Proportional to 81,713.10, 112,777.20 and 76,376.82

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Solution

The fourth proportional to 81,713.10, 112,777.20 and 76,376.82 is: 105,412.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,713.10 : 112,777.20 = 76,376.82 : x
  2. Step 2: Convert to fraction form
    81,713.10/112,777.20 = 76,376.82/x
  3. Step 3: Cross multiply
    81,713.10x = 112,777.20 × 76,376.82
  4. Step 4: Simplify right side
    81,713.10x = 8,613,563,904.50
  5. Step 5: Solve for x
    x = 8,613,563,904.50/81,713.10
  6. Step 6: Final answer
    x = 105,412.28

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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.