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Finding the Fourth Proportional to 127,911.17, 191,802.84 and 74,621.46

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Solution

The fourth proportional to 127,911.17, 191,802.84 and 74,621.46 is: 111,894.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,911.17 : 191,802.84 = 74,621.46 : x
  2. Step 2: Convert to fraction form
    127,911.17/191,802.84 = 74,621.46/x
  3. Step 3: Cross multiply
    127,911.17x = 191,802.84 × 74,621.46
  4. Step 4: Simplify right side
    127,911.17x = 14,312,607,952.95
  5. Step 5: Solve for x
    x = 14,312,607,952.95/127,911.17
  6. Step 6: Final answer
    x = 111,894.91

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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.