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Finding the Fourth Proportional to 107,802.60, 161,703.90 and 80,154.60

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Solution

The fourth proportional to 107,802.60, 161,703.90 and 80,154.60 is: 120,231.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,802.60 : 161,703.90 = 80,154.60 : x
  2. Step 2: Convert to fraction form
    107,802.60/161,703.90 = 80,154.60/x
  3. Step 3: Cross multiply
    107,802.60x = 161,703.90 × 80,154.60
  4. Step 4: Simplify right side
    107,802.60x = 12,961,311,422.94
  5. Step 5: Solve for x
    x = 12,961,311,422.94/107,802.60
  6. Step 6: Final answer
    x = 120,231.90

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1.5x scale

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.