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Finding the Fourth Proportional to 127,561.90, 191,346 and 61,009.06

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Solution

The fourth proportional to 127,561.90, 191,346 and 61,009.06 is: 91,515.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,561.90 : 191,346 = 61,009.06 : x
  2. Step 2: Convert to fraction form
    127,561.90/191,346 = 61,009.06/x
  3. Step 3: Cross multiply
    127,561.90x = 191,346 × 61,009.06
  4. Step 4: Simplify right side
    127,561.90x = 11,673,839,594.76
  5. Step 5: Solve for x
    x = 11,673,839,594.76/127,561.90
  6. Step 6: Final answer
    x = 91,515.10

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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.