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Finding the Fourth Proportional to 128,047.68, 176,715.81 and 71,467.56

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Solution

The fourth proportional to 128,047.68, 176,715.81 and 71,467.56 is: 98,630.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,047.68 : 176,715.81 = 71,467.56 : x
  2. Step 2: Convert to fraction form
    128,047.68/176,715.81 = 71,467.56/x
  3. Step 3: Cross multiply
    128,047.68x = 176,715.81 × 71,467.56
  4. Step 4: Simplify right side
    128,047.68x = 12,629,447,754.12
  5. Step 5: Solve for x
    x = 12,629,447,754.12/128,047.68
  6. Step 6: Final answer
    x = 98,630.82

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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.