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Finding the Fourth Proportional to 123,355.64, 170,311.20 and 75,635.30

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Solution

The fourth proportional to 123,355.64, 170,311.20 and 75,635.30 is: 104,426.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,355.64 : 170,311.20 = 75,635.30 : x
  2. Step 2: Convert to fraction form
    123,355.64/170,311.20 = 75,635.30/x
  3. Step 3: Cross multiply
    123,355.64x = 170,311.20 × 75,635.30
  4. Step 4: Simplify right side
    123,355.64x = 12,881,538,705.36
  5. Step 5: Solve for x
    x = 12,881,538,705.36/123,355.64
  6. Step 6: Final answer
    x = 104,426.02

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1.5x scale

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.