Home / 128,985.60-194,620.80-127,142.40

Finding the Fourth Proportional to 128,985.60, 194,620.80 and 127,142.40

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Solution

The fourth proportional to 128,985.60, 194,620.80 and 127,142.40 is: 191,839.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,985.60 : 194,620.80 = 127,142.40 : x
  2. Step 2: Convert to fraction form
    128,985.60/194,620.80 = 127,142.40/x
  3. Step 3: Cross multiply
    128,985.60x = 194,620.80 × 127,142.40
  4. Step 4: Simplify right side
    128,985.60x = 24,744,555,601.92
  5. Step 5: Solve for x
    x = 24,744,555,601.92/128,985.60
  6. Step 6: Final answer
    x = 191,839.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.