Home / 128,538.20-192,807.30-127,663.40

Finding the Fourth Proportional to 128,538.20, 192,807.30 and 127,663.40

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Solution

The fourth proportional to 128,538.20, 192,807.30 and 127,663.40 is: 191,495.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,538.20 : 192,807.30 = 127,663.40 : x
  2. Step 2: Convert to fraction form
    128,538.20/192,807.30 = 127,663.40/x
  3. Step 3: Cross multiply
    128,538.20x = 192,807.30 × 127,663.40
  4. Step 4: Simplify right side
    128,538.20x = 24,614,435,462.82
  5. Step 5: Solve for x
    x = 24,614,435,462.82/128,538.20
  6. Step 6: Final answer
    x = 191,495.10

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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.