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Finding the Fourth Proportional to 107,991.61, 149,009.96 and 62,659.20

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Solution

The fourth proportional to 107,991.61, 149,009.96 and 62,659.20 is: 86,458.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,991.61 : 149,009.96 = 62,659.20 : x
  2. Step 2: Convert to fraction form
    107,991.61/149,009.96 = 62,659.20/x
  3. Step 3: Cross multiply
    107,991.61x = 149,009.96 × 62,659.20
  4. Step 4: Simplify right side
    107,991.61x = 9,336,844,885.63
  5. Step 5: Solve for x
    x = 9,336,844,885.63/107,991.61
  6. Step 6: Final answer
    x = 86,458.98

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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.