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Finding the Fourth Proportional to 138,803.36, 191,417.52 and 91,098.08

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Solution

The fourth proportional to 138,803.36, 191,417.52 and 91,098.08 is: 125,629.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,803.36 : 191,417.52 = 91,098.08 : x
  2. Step 2: Convert to fraction form
    138,803.36/191,417.52 = 91,098.08/x
  3. Step 3: Cross multiply
    138,803.36x = 191,417.52 × 91,098.08
  4. Step 4: Simplify right side
    138,803.36x = 17,437,768,550.36
  5. Step 5: Solve for x
    x = 17,437,768,550.36/138,803.36
  6. Step 6: Final answer
    x = 125,629.30

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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.