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Finding the Fourth Proportional to 123,509.32, 170,420.42 and 69,062.47

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Solution

The fourth proportional to 123,509.32, 170,420.42 and 69,062.47 is: 95,293.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,509.32 : 170,420.42 = 69,062.47 : x
  2. Step 2: Convert to fraction form
    123,509.32/170,420.42 = 69,062.47/x
  3. Step 3: Cross multiply
    123,509.32x = 170,420.42 × 69,062.47
  4. Step 4: Simplify right side
    123,509.32x = 11,769,655,143.64
  5. Step 5: Solve for x
    x = 11,769,655,143.64/123,509.32
  6. Step 6: Final answer
    x = 95,293.66

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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.