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Finding the Fourth Proportional to 128,030.35, 176,680.90 and 70,669.66

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Solution

The fourth proportional to 128,030.35, 176,680.90 and 70,669.66 is: 97,523.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,030.35 : 176,680.90 = 70,669.66 : x
  2. Step 2: Convert to fraction form
    128,030.35/176,680.90 = 70,669.66/x
  3. Step 3: Cross multiply
    128,030.35x = 176,680.90 × 70,669.66
  4. Step 4: Simplify right side
    128,030.35x = 12,485,979,556.62
  5. Step 5: Solve for x
    x = 12,485,979,556.62/128,030.35
  6. Step 6: Final answer
    x = 97,523.59

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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.