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Finding the Fourth Proportional to 109,200.20, 163,800.30 and 74,208.20

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Solution

The fourth proportional to 109,200.20, 163,800.30 and 74,208.20 is: 111,312.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,200.20 : 163,800.30 = 74,208.20 : x
  2. Step 2: Convert to fraction form
    109,200.20/163,800.30 = 74,208.20/x
  3. Step 3: Cross multiply
    109,200.20x = 163,800.30 × 74,208.20
  4. Step 4: Simplify right side
    109,200.20x = 12,155,325,422.46
  5. Step 5: Solve for x
    x = 12,155,325,422.46/109,200.20
  6. Step 6: Final answer
    x = 111,312.30

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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.