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Finding the Fourth Proportional to 123,406.99, 170,292.30 and 69,684.55

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Solution

The fourth proportional to 123,406.99, 170,292.30 and 69,684.55 is: 96,159.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,406.99 : 170,292.30 = 69,684.55 : x
  2. Step 2: Convert to fraction form
    123,406.99/170,292.30 = 69,684.55/x
  3. Step 3: Cross multiply
    123,406.99x = 170,292.30 × 69,684.55
  4. Step 4: Simplify right side
    123,406.99x = 11,866,742,293.97
  5. Step 5: Solve for x
    x = 11,866,742,293.97/123,406.99
  6. Step 6: Final answer
    x = 96,159.40

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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.