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Finding the Fourth Proportional to 129,035.01, 193,458.15 and 86,810.12

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Solution

The fourth proportional to 129,035.01, 193,458.15 and 86,810.12 is: 130,151.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,035.01 : 193,458.15 = 86,810.12 : x
  2. Step 2: Convert to fraction form
    129,035.01/193,458.15 = 86,810.12/x
  3. Step 3: Cross multiply
    129,035.01x = 193,458.15 × 86,810.12
  4. Step 4: Simplify right side
    129,035.01x = 16,794,125,216.48
  5. Step 5: Solve for x
    x = 16,794,125,216.48/129,035.01
  6. Step 6: Final answer
    x = 130,151.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.