Home / 115,715.71-159,679.38-64,725.76

Finding the Fourth Proportional to 115,715.71, 159,679.38 and 64,725.76

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Solution

The fourth proportional to 115,715.71, 159,679.38 and 64,725.76 is: 89,316.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,715.71 : 159,679.38 = 64,725.76 : x
  2. Step 2: Convert to fraction form
    115,715.71/159,679.38 = 64,725.76/x
  3. Step 3: Cross multiply
    115,715.71x = 159,679.38 × 64,725.76
  4. Step 4: Simplify right side
    115,715.71x = 10,335,369,226.83
  5. Step 5: Solve for x
    x = 10,335,369,226.83/115,715.71
  6. Step 6: Final answer
    x = 89,316.91

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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.