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Finding the Fourth Proportional to 108,928.80, 163,360.80 and 42,330.60

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Solution

The fourth proportional to 108,928.80, 163,360.80 and 42,330.60 is: 63,483.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,928.80 : 163,360.80 = 42,330.60 : x
  2. Step 2: Convert to fraction form
    108,928.80/163,360.80 = 42,330.60/x
  3. Step 3: Cross multiply
    108,928.80x = 163,360.80 × 42,330.60
  4. Step 4: Simplify right side
    108,928.80x = 6,915,160,680.48
  5. Step 5: Solve for x
    x = 6,915,160,680.48/108,928.80
  6. Step 6: Final answer
    x = 63,483.31

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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.