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Finding the Fourth Proportional to 98,656.84, 136,256.34 and 91,191.88

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Solution

The fourth proportional to 98,656.84, 136,256.34 and 91,191.88 is: 125,946.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,656.84 : 136,256.34 = 91,191.88 : x
  2. Step 2: Convert to fraction form
    98,656.84/136,256.34 = 91,191.88/x
  3. Step 3: Cross multiply
    98,656.84x = 136,256.34 × 91,191.88
  4. Step 4: Simplify right side
    98,656.84x = 12,425,471,806.52
  5. Step 5: Solve for x
    x = 12,425,471,806.52/98,656.84
  6. Step 6: Final answer
    x = 125,946.38

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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.