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Finding the Fourth Proportional to 128,866.49, 177,777.48 and 83,555.95

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Solution

The fourth proportional to 128,866.49, 177,777.48 and 83,555.95 is: 115,269.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,866.49 : 177,777.48 = 83,555.95 : x
  2. Step 2: Convert to fraction form
    128,866.49/177,777.48 = 83,555.95/x
  3. Step 3: Cross multiply
    128,866.49x = 177,777.48 × 83,555.95
  4. Step 4: Simplify right side
    128,866.49x = 14,854,366,256.67
  5. Step 5: Solve for x
    x = 14,854,366,256.67/128,866.49
  6. Step 6: Final answer
    x = 115,269.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.