Home / 128,897.48-193,331.90-40,143.56

Finding the Fourth Proportional to 128,897.48, 193,331.90 and 40,143.56

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Solution

The fourth proportional to 128,897.48, 193,331.90 and 40,143.56 is: 60,210.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,897.48 : 193,331.90 = 40,143.56 : x
  2. Step 2: Convert to fraction form
    128,897.48/193,331.90 = 40,143.56/x
  3. Step 3: Cross multiply
    128,897.48x = 193,331.90 × 40,143.56
  4. Step 4: Simplify right side
    128,897.48x = 7,761,030,526.85
  5. Step 5: Solve for x
    x = 7,761,030,526.85/128,897.48
  6. Step 6: Final answer
    x = 60,210.88

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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.