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Finding the Fourth Proportional to 138,274.48, 207,460.32 and 79,159.60

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Solution

The fourth proportional to 138,274.48, 207,460.32 and 79,159.60 is: 118,767.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,274.48 : 207,460.32 = 79,159.60 : x
  2. Step 2: Convert to fraction form
    138,274.48/207,460.32 = 79,159.60/x
  3. Step 3: Cross multiply
    138,274.48x = 207,460.32 × 79,159.60
  4. Step 4: Simplify right side
    138,274.48x = 16,422,475,947.07
  5. Step 5: Solve for x
    x = 16,422,475,947.07/138,274.48
  6. Step 6: Final answer
    x = 118,767.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.