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Finding the Fourth Proportional to 128,173.32, 176,966.64 and 82,960.74

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Solution

The fourth proportional to 128,173.32, 176,966.64 and 82,960.74 is: 114,542.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,173.32 : 176,966.64 = 82,960.74 : x
  2. Step 2: Convert to fraction form
    128,173.32/176,966.64 = 82,960.74/x
  3. Step 3: Cross multiply
    128,173.32x = 176,966.64 × 82,960.74
  4. Step 4: Simplify right side
    128,173.32x = 14,681,283,409.71
  5. Step 5: Solve for x
    x = 14,681,283,409.71/128,173.32
  6. Step 6: Final answer
    x = 114,542.43

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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.