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Finding the Fourth Proportional to 123,399.60, 170,291.52 and 66,810.96

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Solution

The fourth proportional to 123,399.60, 170,291.52 and 66,810.96 is: 92,199.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,399.60 : 170,291.52 = 66,810.96 : x
  2. Step 2: Convert to fraction form
    123,399.60/170,291.52 = 66,810.96/x
  3. Step 3: Cross multiply
    123,399.60x = 170,291.52 × 66,810.96
  4. Step 4: Simplify right side
    123,399.60x = 11,377,339,931.06
  5. Step 5: Solve for x
    x = 11,377,339,931.06/123,399.60
  6. Step 6: Final answer
    x = 92,199.16

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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.