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Finding the Fourth Proportional to 138,666.59, 191,343.44 and 78,233.71

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Solution

The fourth proportional to 138,666.59, 191,343.44 and 78,233.71 is: 107,953.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,666.59 : 191,343.44 = 78,233.71 : x
  2. Step 2: Convert to fraction form
    138,666.59/191,343.44 = 78,233.71/x
  3. Step 3: Cross multiply
    138,666.59x = 191,343.44 × 78,233.71
  4. Step 4: Simplify right side
    138,666.59x = 14,969,507,195.36
  5. Step 5: Solve for x
    x = 14,969,507,195.36/138,666.59
  6. Step 6: Final answer
    x = 107,953.24

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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.