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Finding the Fourth Proportional to 113,820.40, 170,884.20 and 72,348.40

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Solution

The fourth proportional to 113,820.40, 170,884.20 and 72,348.40 is: 108,620.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,820.40 : 170,884.20 = 72,348.40 : x
  2. Step 2: Convert to fraction form
    113,820.40/170,884.20 = 72,348.40/x
  3. Step 3: Cross multiply
    113,820.40x = 170,884.20 × 72,348.40
  4. Step 4: Simplify right side
    113,820.40x = 12,363,198,455.28
  5. Step 5: Solve for x
    x = 12,363,198,455.28/113,820.40
  6. Step 6: Final answer
    x = 108,620.23

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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.