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Finding the Fourth Proportional to 163,561.80, 245,342.70 and 135,021.45

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Solution

The fourth proportional to 163,561.80, 245,342.70 and 135,021.45 is: 202,532.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,561.80 : 245,342.70 = 135,021.45 : x
  2. Step 2: Convert to fraction form
    163,561.80/245,342.70 = 135,021.45/x
  3. Step 3: Cross multiply
    163,561.80x = 245,342.70 × 135,021.45
  4. Step 4: Simplify right side
    163,561.80x = 33,126,527,100.92
  5. Step 5: Solve for x
    x = 33,126,527,100.92/163,561.80
  6. Step 6: Final answer
    x = 202,532.18

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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.