Home / 128,821.80-193,002.30-109,007.40

Finding the Fourth Proportional to 128,821.80, 193,002.30 and 109,007.40

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Solution

The fourth proportional to 128,821.80, 193,002.30 and 109,007.40 is: 163,316.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,821.80 : 193,002.30 = 109,007.40 : x
  2. Step 2: Convert to fraction form
    128,821.80/193,002.30 = 109,007.40/x
  3. Step 3: Cross multiply
    128,821.80x = 193,002.30 × 109,007.40
  4. Step 4: Simplify right side
    128,821.80x = 21,038,678,917.02
  5. Step 5: Solve for x
    x = 21,038,678,917.02/128,821.80
  6. Step 6: Final answer
    x = 163,316.14

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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.