Home / 107,816.60-161,724.90-90,709.40

Finding the Fourth Proportional to 107,816.60, 161,724.90 and 90,709.40

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Solution

The fourth proportional to 107,816.60, 161,724.90 and 90,709.40 is: 136,064.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,816.60 : 161,724.90 = 90,709.40 : x
  2. Step 2: Convert to fraction form
    107,816.60/161,724.90 = 90,709.40/x
  3. Step 3: Cross multiply
    107,816.60x = 161,724.90 × 90,709.40
  4. Step 4: Simplify right side
    107,816.60x = 14,669,968,644.06
  5. Step 5: Solve for x
    x = 14,669,968,644.06/107,816.60
  6. Step 6: Final answer
    x = 136,064.10

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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.