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Finding the Fourth Proportional to 210,122.75, 315,141.75 and 76,957.54

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Solution

The fourth proportional to 210,122.75, 315,141.75 and 76,957.54 is: 115,420.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,122.75 : 315,141.75 = 76,957.54 : x
  2. Step 2: Convert to fraction form
    210,122.75/315,141.75 = 76,957.54/x
  3. Step 3: Cross multiply
    210,122.75x = 315,141.75 × 76,957.54
  4. Step 4: Simplify right side
    210,122.75x = 24,252,533,831.30
  5. Step 5: Solve for x
    x = 24,252,533,831.30/210,122.75
  6. Step 6: Final answer
    x = 115,420.79

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1.5x scale

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.