Home / 81,528.56-112,507.65-45,717.78

Finding the Fourth Proportional to 81,528.56, 112,507.65 and 45,717.78

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Solution

The fourth proportional to 81,528.56, 112,507.65 and 45,717.78 is: 63,089.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,528.56 : 112,507.65 = 45,717.78 : x
  2. Step 2: Convert to fraction form
    81,528.56/112,507.65 = 45,717.78/x
  3. Step 3: Cross multiply
    81,528.56x = 112,507.65 × 45,717.78
  4. Step 4: Simplify right side
    81,528.56x = 5,143,599,991.02
  5. Step 5: Solve for x
    x = 5,143,599,991.02/81,528.56
  6. Step 6: Final answer
    x = 63,089.55

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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.