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Finding the Fourth Proportional to 86,378.66, 119,109.31 and 54,101.78

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Solution

The fourth proportional to 86,378.66, 119,109.31 and 54,101.78 is: 74,602.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,378.66 : 119,109.31 = 54,101.78 : x
  2. Step 2: Convert to fraction form
    86,378.66/119,109.31 = 54,101.78/x
  3. Step 3: Cross multiply
    86,378.66x = 119,109.31 × 54,101.78
  4. Step 4: Simplify right side
    86,378.66x = 6,444,024,954.77
  5. Step 5: Solve for x
    x = 6,444,024,954.77/86,378.66
  6. Step 6: Final answer
    x = 74,602.05

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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.