Home / 128,395.12-192,675.30-69,271.60

Finding the Fourth Proportional to 128,395.12, 192,675.30 and 69,271.60

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Solution

The fourth proportional to 128,395.12, 192,675.30 and 69,271.60 is: 103,951.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,395.12 : 192,675.30 = 69,271.60 : x
  2. Step 2: Convert to fraction form
    128,395.12/192,675.30 = 69,271.60/x
  3. Step 3: Cross multiply
    128,395.12x = 192,675.30 × 69,271.60
  4. Step 4: Simplify right side
    128,395.12x = 13,346,926,311.48
  5. Step 5: Solve for x
    x = 13,346,926,311.48/128,395.12
  6. Step 6: Final answer
    x = 103,951.98

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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.