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Finding the Fourth Proportional to 81,715.68, 112,722.13 and 75,935.93

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Solution

The fourth proportional to 81,715.68, 112,722.13 and 75,935.93 is: 104,749.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,715.68 : 112,722.13 = 75,935.93 : x
  2. Step 2: Convert to fraction form
    81,715.68/112,722.13 = 75,935.93/x
  3. Step 3: Cross multiply
    81,715.68x = 112,722.13 × 75,935.93
  4. Step 4: Simplify right side
    81,715.68x = 8,559,659,393.45
  5. Step 5: Solve for x
    x = 8,559,659,393.45/81,715.68
  6. Step 6: Final answer
    x = 104,749.29

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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.