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Finding the Fourth Proportional to 128,248.70, 192,382.71 and 38,284.30

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Solution

The fourth proportional to 128,248.70, 192,382.71 and 38,284.30 is: 57,429.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,248.70 : 192,382.71 = 38,284.30 : x
  2. Step 2: Convert to fraction form
    128,248.70/192,382.71 = 38,284.30/x
  3. Step 3: Cross multiply
    128,248.70x = 192,382.71 × 38,284.30
  4. Step 4: Simplify right side
    128,248.70x = 7,365,237,384.45
  5. Step 5: Solve for x
    x = 7,365,237,384.45/128,248.70
  6. Step 6: Final answer
    x = 57,429.33

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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.