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Finding the Fourth Proportional to 128,497.88, 191,805.71 and 113,347.80

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Solution

The fourth proportional to 128,497.88, 191,805.71 and 113,347.80 is: 169,191.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,497.88 : 191,805.71 = 113,347.80 : x
  2. Step 2: Convert to fraction form
    128,497.88/191,805.71 = 113,347.80/x
  3. Step 3: Cross multiply
    128,497.88x = 191,805.71 × 113,347.80
  4. Step 4: Simplify right side
    128,497.88x = 21,740,755,255.94
  5. Step 5: Solve for x
    x = 21,740,755,255.94/128,497.88
  6. Step 6: Final answer
    x = 169,191.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.