Home / 199,848.72-275,660.64-128,115.12

Finding the Fourth Proportional to 199,848.72, 275,660.64 and 128,115.12

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Solution

The fourth proportional to 199,848.72, 275,660.64 and 128,115.12 is: 176,715.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,848.72 : 275,660.64 = 128,115.12 : x
  2. Step 2: Convert to fraction form
    199,848.72/275,660.64 = 128,115.12/x
  3. Step 3: Cross multiply
    199,848.72x = 275,660.64 × 128,115.12
  4. Step 4: Simplify right side
    199,848.72x = 35,316,295,972.88
  5. Step 5: Solve for x
    x = 35,316,295,972.88/199,848.72
  6. Step 6: Final answer
    x = 176,715.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.