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Finding the Fourth Proportional to 138,096.74, 190,599.65 and 86,437.79

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Solution

The fourth proportional to 138,096.74, 190,599.65 and 86,437.79 is: 119,300.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,096.74 : 190,599.65 = 86,437.79 : x
  2. Step 2: Convert to fraction form
    138,096.74/190,599.65 = 86,437.79/x
  3. Step 3: Cross multiply
    138,096.74x = 190,599.65 × 86,437.79
  4. Step 4: Simplify right side
    138,096.74x = 16,475,011,135.59
  5. Step 5: Solve for x
    x = 16,475,011,135.59/138,096.74
  6. Step 6: Final answer
    x = 119,300.51

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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.