Home / 128,897.39-193,331.68-40,143.47

Finding the Fourth Proportional to 128,897.39, 193,331.68 and 40,143.47

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Solution

The fourth proportional to 128,897.39, 193,331.68 and 40,143.47 is: 60,210.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,897.39 : 193,331.68 = 40,143.47 : x
  2. Step 2: Convert to fraction form
    128,897.39/193,331.68 = 40,143.47/x
  3. Step 3: Cross multiply
    128,897.39x = 193,331.68 × 40,143.47
  4. Step 4: Simplify right side
    128,897.39x = 7,761,003,429.11
  5. Step 5: Solve for x
    x = 7,761,003,429.11/128,897.39
  6. Step 6: Final answer
    x = 60,210.71

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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.