Home / 128,823.80-193,005.30-109,009.40

Finding the Fourth Proportional to 128,823.80, 193,005.30 and 109,009.40

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Solution

The fourth proportional to 128,823.80, 193,005.30 and 109,009.40 is: 163,319.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,823.80 : 193,005.30 = 109,009.40 : x
  2. Step 2: Convert to fraction form
    128,823.80/193,005.30 = 109,009.40/x
  3. Step 3: Cross multiply
    128,823.80x = 193,005.30 × 109,009.40
  4. Step 4: Simplify right side
    128,823.80x = 21,039,391,949.82
  5. Step 5: Solve for x
    x = 21,039,391,949.82/128,823.80
  6. Step 6: Final answer
    x = 163,319.14

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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.