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Finding the Fourth Proportional to 123,728.85, 170,746.26 and 67,140.22

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Solution

The fourth proportional to 123,728.85, 170,746.26 and 67,140.22 is: 92,653.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,728.85 : 170,746.26 = 67,140.22 : x
  2. Step 2: Convert to fraction form
    123,728.85/170,746.26 = 67,140.22/x
  3. Step 3: Cross multiply
    123,728.85x = 170,746.26 × 67,140.22
  4. Step 4: Simplify right side
    123,728.85x = 11,463,941,460.58
  5. Step 5: Solve for x
    x = 11,463,941,460.58/123,728.85
  6. Step 6: Final answer
    x = 92,653.75

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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.