Home / 128,304.80-192,631.73-72,184.40

Finding the Fourth Proportional to 128,304.80, 192,631.73 and 72,184.40

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Solution

The fourth proportional to 128,304.80, 192,631.73 and 72,184.40 is: 108,374.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304.80 : 192,631.73 = 72,184.40 : x
  2. Step 2: Convert to fraction form
    128,304.80/192,631.73 = 72,184.40/x
  3. Step 3: Cross multiply
    128,304.80x = 192,631.73 × 72,184.40
  4. Step 4: Simplify right side
    128,304.80x = 13,905,004,526.93
  5. Step 5: Solve for x
    x = 13,905,004,526.93/128,304.80
  6. Step 6: Final answer
    x = 108,374.78

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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.