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Finding the Fourth Proportional to 210,371.18, 315,361.76 and 83,980.80

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Solution

The fourth proportional to 210,371.18, 315,361.76 and 83,980.80 is: 125,893.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,371.18 : 315,361.76 = 83,980.80 : x
  2. Step 2: Convert to fraction form
    210,371.18/315,361.76 = 83,980.80/x
  3. Step 3: Cross multiply
    210,371.18x = 315,361.76 × 83,980.80
  4. Step 4: Simplify right side
    210,371.18x = 26,484,332,474.30
  5. Step 5: Solve for x
    x = 26,484,332,474.30/210,371.18
  6. Step 6: Final answer
    x = 125,893.35

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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.