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Finding the Fourth Proportional to 210,073.20, 315,129.39 and 83,682.82

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Solution

The fourth proportional to 210,073.20, 315,129.39 and 83,682.82 is: 125,532.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,073.20 : 315,129.39 = 83,682.82 : x
  2. Step 2: Convert to fraction form
    210,073.20/315,129.39 = 83,682.82/x
  3. Step 3: Cross multiply
    210,073.20x = 315,129.39 × 83,682.82
  4. Step 4: Simplify right side
    210,073.20x = 26,370,916,100.18
  5. Step 5: Solve for x
    x = 26,370,916,100.18/210,073.20
  6. Step 6: Final answer
    x = 125,532.04

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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.