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Finding the Fourth Proportional to 128,446.80, 192,425.40 and 69,262.80

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Solution

The fourth proportional to 128,446.80, 192,425.40 and 69,262.80 is: 103,762.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,446.80 : 192,425.40 = 69,262.80 : x
  2. Step 2: Convert to fraction form
    128,446.80/192,425.40 = 69,262.80/x
  3. Step 3: Cross multiply
    128,446.80x = 192,425.40 × 69,262.80
  4. Step 4: Simplify right side
    128,446.80x = 13,327,921,995.12
  5. Step 5: Solve for x
    x = 13,327,921,995.12/128,446.80
  6. Step 6: Final answer
    x = 103,762.20

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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.