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Finding the Fourth Proportional to 210,212.80, 315,319.20 and 62,468.80

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Solution

The fourth proportional to 210,212.80, 315,319.20 and 62,468.80 is: 93,703.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,212.80 : 315,319.20 = 62,468.80 : x
  2. Step 2: Convert to fraction form
    210,212.80/315,319.20 = 62,468.80/x
  3. Step 3: Cross multiply
    210,212.80x = 315,319.20 × 62,468.80
  4. Step 4: Simplify right side
    210,212.80x = 19,697,612,040.96
  5. Step 5: Solve for x
    x = 19,697,612,040.96/210,212.80
  6. Step 6: Final answer
    x = 93,703.20

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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.