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Finding the Fourth Proportional to 163,071.20, 244,606.80 and 78,871.70

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Solution

The fourth proportional to 163,071.20, 244,606.80 and 78,871.70 is: 118,307.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,071.20 : 244,606.80 = 78,871.70 : x
  2. Step 2: Convert to fraction form
    163,071.20/244,606.80 = 78,871.70/x
  3. Step 3: Cross multiply
    163,071.20x = 244,606.80 × 78,871.70
  4. Step 4: Simplify right side
    163,071.20x = 19,292,554,147.56
  5. Step 5: Solve for x
    x = 19,292,554,147.56/163,071.20
  6. Step 6: Final answer
    x = 118,307.55

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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.