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Finding the Fourth Proportional to 120,853.60, 169,370 and 120,853.60

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Solution

The fourth proportional to 120,853.60, 169,370 and 120,853.60 is: 169,370

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,853.60 : 169,370 = 120,853.60 : x
  2. Step 2: Convert to fraction form
    120,853.60/169,370 = 120,853.60/x
  3. Step 3: Cross multiply
    120,853.60x = 169,370 × 120,853.60
  4. Step 4: Simplify right side
    120,853.60x = 20,468,974,232
  5. Step 5: Solve for x
    x = 20,468,974,232/120,853.60
  6. Step 6: Final answer
    x = 169,370

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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.