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Finding the Fourth Proportional to 128,093.67, 176,769.45 and 71,505

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Solution

The fourth proportional to 128,093.67, 176,769.45 and 71,505 is: 98,677.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,093.67 : 176,769.45 = 71,505 : x
  2. Step 2: Convert to fraction form
    128,093.67/176,769.45 = 71,505/x
  3. Step 3: Cross multiply
    128,093.67x = 176,769.45 × 71,505
  4. Step 4: Simplify right side
    128,093.67x = 12,639,899,522.25
  5. Step 5: Solve for x
    x = 12,639,899,522.25/128,093.67
  6. Step 6: Final answer
    x = 98,677.00

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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.