Home / 123,439.29-170,349.53-75,665.19

Finding the Fourth Proportional to 123,439.29, 170,349.53 and 75,665.19

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Solution

The fourth proportional to 123,439.29, 170,349.53 and 75,665.19 is: 104,419.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,439.29 : 170,349.53 = 75,665.19 : x
  2. Step 2: Convert to fraction form
    123,439.29/170,349.53 = 75,665.19/x
  3. Step 3: Cross multiply
    123,439.29x = 170,349.53 × 75,665.19
  4. Step 4: Simplify right side
    123,439.29x = 12,889,529,281.75
  5. Step 5: Solve for x
    x = 12,889,529,281.75/123,439.29
  6. Step 6: Final answer
    x = 104,419.99

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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.