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Finding the Fourth Proportional to 343,881.68, 515,797.74 and 91,156.41

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Solution

The fourth proportional to 343,881.68, 515,797.74 and 91,156.41 is: 136,728.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,881.68 : 515,797.74 = 91,156.41 : x
  2. Step 2: Convert to fraction form
    343,881.68/515,797.74 = 91,156.41/x
  3. Step 3: Cross multiply
    343,881.68x = 515,797.74 × 91,156.41
  4. Step 4: Simplify right side
    343,881.68x = 47,018,270,264.51
  5. Step 5: Solve for x
    x = 47,018,270,264.51/343,881.68
  6. Step 6: Final answer
    x = 136,728.05

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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.