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Finding the Fourth Proportional to 139,044.84, 191,779.97 and 91,280.76

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Solution

The fourth proportional to 139,044.84, 191,779.97 and 91,280.76 is: 125,900.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,044.84 : 191,779.97 = 91,280.76 : x
  2. Step 2: Convert to fraction form
    139,044.84/191,779.97 = 91,280.76/x
  3. Step 3: Cross multiply
    139,044.84x = 191,779.97 × 91,280.76
  4. Step 4: Simplify right side
    139,044.84x = 17,505,820,957.97
  5. Step 5: Solve for x
    x = 17,505,820,957.97/139,044.84
  6. Step 6: Final answer
    x = 125,900.54

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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.