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Finding the Fourth Proportional to 123,405.99, 170,290.92 and 69,683.55

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Solution

The fourth proportional to 123,405.99, 170,290.92 and 69,683.55 is: 96,158.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,405.99 : 170,290.92 = 69,683.55 : x
  2. Step 2: Convert to fraction form
    123,405.99/170,290.92 = 69,683.55/x
  3. Step 3: Cross multiply
    123,405.99x = 170,290.92 × 69,683.55
  4. Step 4: Simplify right side
    123,405.99x = 11,866,475,838.37
  5. Step 5: Solve for x
    x = 11,866,475,838.37/123,405.99
  6. Step 6: Final answer
    x = 96,158.02

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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.