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Finding the Fourth Proportional to 210,681.60, 315,561.60 and 163,564.80

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Solution

The fourth proportional to 210,681.60, 315,561.60 and 163,564.80 is: 244,989.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,681.60 : 315,561.60 = 163,564.80 : x
  2. Step 2: Convert to fraction form
    210,681.60/315,561.60 = 163,564.80/x
  3. Step 3: Cross multiply
    210,681.60x = 315,561.60 × 163,564.80
  4. Step 4: Simplify right side
    210,681.60x = 51,614,769,991.68
  5. Step 5: Solve for x
    x = 51,614,769,991.68/210,681.60
  6. Step 6: Final answer
    x = 244,989.45

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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.