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Finding the Fourth Proportional to 210,219.84, 315,300 and 60,472.80

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Solution

The fourth proportional to 210,219.84, 315,300 and 60,472.80 is: 90,700.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,219.84 : 315,300 = 60,472.80 : x
  2. Step 2: Convert to fraction form
    210,219.84/315,300 = 60,472.80/x
  3. Step 3: Cross multiply
    210,219.84x = 315,300 × 60,472.80
  4. Step 4: Simplify right side
    210,219.84x = 19,067,073,840
  5. Step 5: Solve for x
    x = 19,067,073,840/210,219.84
  6. Step 6: Final answer
    x = 90,700.64

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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.