Home / 128,359.40-192,571.54-103,624.20

Finding the Fourth Proportional to 128,359.40, 192,571.54 and 103,624.20

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Solution

The fourth proportional to 128,359.40, 192,571.54 and 103,624.20 is: 155,462.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,359.40 : 192,571.54 = 103,624.20 : x
  2. Step 2: Convert to fraction form
    128,359.40/192,571.54 = 103,624.20/x
  3. Step 3: Cross multiply
    128,359.40x = 192,571.54 × 103,624.20
  4. Step 4: Simplify right side
    128,359.40x = 19,955,071,775.27
  5. Step 5: Solve for x
    x = 19,955,071,775.27/128,359.40
  6. Step 6: Final answer
    x = 155,462.49

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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.