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Finding the Fourth Proportional to 210,688.60, 315,572.10 and 163,571.80

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Solution

The fourth proportional to 210,688.60, 315,572.10 and 163,571.80 is: 244,999.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,688.60 : 315,572.10 = 163,571.80 : x
  2. Step 2: Convert to fraction form
    210,688.60/315,572.10 = 163,571.80/x
  3. Step 3: Cross multiply
    210,688.60x = 315,572.10 × 163,571.80
  4. Step 4: Simplify right side
    210,688.60x = 51,618,696,426.78
  5. Step 5: Solve for x
    x = 51,618,696,426.78/210,688.60
  6. Step 6: Final answer
    x = 244,999.95

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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.