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Finding the Fourth Proportional to 120,690.20, 169,316.20 and 120,690.20

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Solution

The fourth proportional to 120,690.20, 169,316.20 and 120,690.20 is: 169,316.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,690.20 : 169,316.20 = 120,690.20 : x
  2. Step 2: Convert to fraction form
    120,690.20/169,316.20 = 120,690.20/x
  3. Step 3: Cross multiply
    120,690.20x = 169,316.20 × 120,690.20
  4. Step 4: Simplify right side
    120,690.20x = 20,434,806,041.24
  5. Step 5: Solve for x
    x = 20,434,806,041.24/120,690.20
  6. Step 6: Final answer
    x = 169,316.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.