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Finding the Fourth Proportional to 108,976.80, 163,432.80 and 42,378.60

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Solution

The fourth proportional to 108,976.80, 163,432.80 and 42,378.60 is: 63,555.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,976.80 : 163,432.80 = 42,378.60 : x
  2. Step 2: Convert to fraction form
    108,976.80/163,432.80 = 42,378.60/x
  3. Step 3: Cross multiply
    108,976.80x = 163,432.80 × 42,378.60
  4. Step 4: Simplify right side
    108,976.80x = 6,926,053,258.08
  5. Step 5: Solve for x
    x = 6,926,053,258.08/108,976.80
  6. Step 6: Final answer
    x = 63,555.30

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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.