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Finding the Fourth Proportional to 123,357.64, 170,313.96 and 75,637.30

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Solution

The fourth proportional to 123,357.64, 170,313.96 and 75,637.30 is: 104,428.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,357.64 : 170,313.96 = 75,637.30 : x
  2. Step 2: Convert to fraction form
    123,357.64/170,313.96 = 75,637.30/x
  3. Step 3: Cross multiply
    123,357.64x = 170,313.96 × 75,637.30
  4. Step 4: Simplify right side
    123,357.64x = 12,882,088,086.71
  5. Step 5: Solve for x
    x = 12,882,088,086.71/123,357.64
  6. Step 6: Final answer
    x = 104,428.78

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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.