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Finding the Fourth Proportional to 125,986.64, 173,862.80 and 69,399.20

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Solution

The fourth proportional to 125,986.64, 173,862.80 and 69,399.20 is: 95,771.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,986.64 : 173,862.80 = 69,399.20 : x
  2. Step 2: Convert to fraction form
    125,986.64/173,862.80 = 69,399.20/x
  3. Step 3: Cross multiply
    125,986.64x = 173,862.80 × 69,399.20
  4. Step 4: Simplify right side
    125,986.64x = 12,065,939,229.76
  5. Step 5: Solve for x
    x = 12,065,939,229.76/125,986.64
  6. Step 6: Final answer
    x = 95,771.58

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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.