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Finding the Fourth Proportional to 138,984,159.60, 191,718,453.60 and 86,682,393.66

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Solution

The fourth proportional to 138,984,159.60, 191,718,453.60 and 86,682,393.66 is: 119,572,003.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,984,159.60 : 191,718,453.60 = 86,682,393.66 : x
  2. Step 2: Convert to fraction form
    138,984,159.60/191,718,453.60 = 86,682,393.66/x
  3. Step 3: Cross multiply
    138,984,159.60x = 191,718,453.60 × 86,682,393.66
  4. Step 4: Simplify right side
    138,984,159.60x = 16,618,614,466,841,642
  5. Step 5: Solve for x
    x = 16,618,614,466,841,642/138,984,159.60
  6. Step 6: Final answer
    x = 119,572,003.85

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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.