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Finding the Fourth Proportional to 140,215.70, 210,323.55 and 122,719.70

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Solution

The fourth proportional to 140,215.70, 210,323.55 and 122,719.70 is: 184,079.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,215.70 : 210,323.55 = 122,719.70 : x
  2. Step 2: Convert to fraction form
    140,215.70/210,323.55 = 122,719.70/x
  3. Step 3: Cross multiply
    140,215.70x = 210,323.55 × 122,719.70
  4. Step 4: Simplify right side
    140,215.70x = 25,810,842,958.94
  5. Step 5: Solve for x
    x = 25,810,842,958.94/140,215.70
  6. Step 6: Final answer
    x = 184,079.55

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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.