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Finding the Fourth Proportional to 129,625.60, 172,512.64 and 129,625.60

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Solution

The fourth proportional to 129,625.60, 172,512.64 and 129,625.60 is: 172,512.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,625.60 : 172,512.64 = 129,625.60 : x
  2. Step 2: Convert to fraction form
    129,625.60/172,512.64 = 129,625.60/x
  3. Step 3: Cross multiply
    129,625.60x = 172,512.64 × 129,625.60
  4. Step 4: Simplify right side
    129,625.60x = 22,362,054,467.58
  5. Step 5: Solve for x
    x = 22,362,054,467.58/129,625.60
  6. Step 6: Final answer
    x = 172,512.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.