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Finding the Fourth Proportional to 61,238.80, 91,858.20 and 16,872.40

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Solution

The fourth proportional to 61,238.80, 91,858.20 and 16,872.40 is: 25,308.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,238.80 : 91,858.20 = 16,872.40 : x
  2. Step 2: Convert to fraction form
    61,238.80/91,858.20 = 16,872.40/x
  3. Step 3: Cross multiply
    61,238.80x = 91,858.20 × 16,872.40
  4. Step 4: Simplify right side
    61,238.80x = 1,549,868,293.68
  5. Step 5: Solve for x
    x = 1,549,868,293.68/61,238.80
  6. Step 6: Final answer
    x = 25,308.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.