Home / 115,715.88-159,685.26-64,729.32

Finding the Fourth Proportional to 115,715.88, 159,685.26 and 64,729.32

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Solution

The fourth proportional to 115,715.88, 159,685.26 and 64,729.32 is: 89,324.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,715.88 : 159,685.26 = 64,729.32 : x
  2. Step 2: Convert to fraction form
    115,715.88/159,685.26 = 64,729.32/x
  3. Step 3: Cross multiply
    115,715.88x = 159,685.26 × 64,729.32
  4. Step 4: Simplify right side
    115,715.88x = 10,336,318,293.82
  5. Step 5: Solve for x
    x = 10,336,318,293.82/115,715.88
  6. Step 6: Final answer
    x = 89,324.98

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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.