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Finding the Fourth Proportional to 228,721.01, 315,605.45 and 128,119.01

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Solution

The fourth proportional to 228,721.01, 315,605.45 and 128,119.01 is: 176,787.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,721.01 : 315,605.45 = 128,119.01 : x
  2. Step 2: Convert to fraction form
    228,721.01/315,605.45 = 128,119.01/x
  3. Step 3: Cross multiply
    228,721.01x = 315,605.45 × 128,119.01
  4. Step 4: Simplify right side
    228,721.01x = 40,435,057,164.01
  5. Step 5: Solve for x
    x = 40,435,057,164.01/228,721.01
  6. Step 6: Final answer
    x = 176,787.68

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1.5x scale

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.