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Finding the Fourth Proportional to 128,073.46, 176,681.34 and 82,765.69

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Solution

The fourth proportional to 128,073.46, 176,681.34 and 82,765.69 is: 114,177.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,073.46 : 176,681.34 = 82,765.69 : x
  2. Step 2: Convert to fraction form
    128,073.46/176,681.34 = 82,765.69/x
  3. Step 3: Cross multiply
    128,073.46x = 176,681.34 × 82,765.69
  4. Step 4: Simplify right side
    128,073.46x = 14,623,153,015.22
  5. Step 5: Solve for x
    x = 14,623,153,015.22/128,073.46
  6. Step 6: Final answer
    x = 114,177.86

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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.