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Finding the Fourth Proportional to 123,807.66, 170,858.07 and 72,824.10

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Solution

The fourth proportional to 123,807.66, 170,858.07 and 72,824.10 is: 100,499.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,807.66 : 170,858.07 = 72,824.10 : x
  2. Step 2: Convert to fraction form
    123,807.66/170,858.07 = 72,824.10/x
  3. Step 3: Cross multiply
    123,807.66x = 170,858.07 × 72,824.10
  4. Step 4: Simplify right side
    123,807.66x = 12,442,585,175.49
  5. Step 5: Solve for x
    x = 12,442,585,175.49/123,807.66
  6. Step 6: Final answer
    x = 100,499.32

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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.