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Finding the Fourth Proportional to 189,776.65, 261,897.35 and 103,740.39

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Solution

The fourth proportional to 189,776.65, 261,897.35 and 103,740.39 is: 143,164.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,776.65 : 261,897.35 = 103,740.39 : x
  2. Step 2: Convert to fraction form
    189,776.65/261,897.35 = 103,740.39/x
  3. Step 3: Cross multiply
    189,776.65x = 261,897.35 × 103,740.39
  4. Step 4: Simplify right side
    189,776.65x = 27,169,333,228.97
  5. Step 5: Solve for x
    x = 27,169,333,228.97/189,776.65
  6. Step 6: Final answer
    x = 143,164.78

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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.