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Finding the Fourth Proportional to 98,555, 135,846.18 and 77,007.08

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Solution

The fourth proportional to 98,555, 135,846.18 and 77,007.08 is: 106,144.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,555 : 135,846.18 = 77,007.08 : x
  2. Step 2: Convert to fraction form
    98,555/135,846.18 = 77,007.08/x
  3. Step 3: Cross multiply
    98,555x = 135,846.18 × 77,007.08
  4. Step 4: Simplify right side
    98,555x = 10,461,117,650.95
  5. Step 5: Solve for x
    x = 10,461,117,650.95/98,555
  6. Step 6: Final answer
    x = 106,144.97

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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.