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Finding the Fourth Proportional to 128,006.63, 191,866.88 and 47,967.59

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Solution

The fourth proportional to 128,006.63, 191,866.88 and 47,967.59 is: 71,897.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,006.63 : 191,866.88 = 47,967.59 : x
  2. Step 2: Convert to fraction form
    128,006.63/191,866.88 = 47,967.59/x
  3. Step 3: Cross multiply
    128,006.63x = 191,866.88 × 47,967.59
  4. Step 4: Simplify right side
    128,006.63x = 9,203,392,164.19
  5. Step 5: Solve for x
    x = 9,203,392,164.19/128,006.63
  6. Step 6: Final answer
    x = 71,897.78

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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.