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Finding the Fourth Proportional to 107,908.80, 161,690.40 and 70,929.60

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Solution

The fourth proportional to 107,908.80, 161,690.40 and 70,929.60 is: 106,280.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,908.80 : 161,690.40 = 70,929.60 : x
  2. Step 2: Convert to fraction form
    107,908.80/161,690.40 = 70,929.60/x
  3. Step 3: Cross multiply
    107,908.80x = 161,690.40 × 70,929.60
  4. Step 4: Simplify right side
    107,908.80x = 11,468,635,395.84
  5. Step 5: Solve for x
    x = 11,468,635,395.84/107,908.80
  6. Step 6: Final answer
    x = 106,280.82

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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.