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Finding the Fourth Proportional to 125,112.87, 172,619.59 and 70,662.15

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Solution

The fourth proportional to 125,112.87, 172,619.59 and 70,662.15 is: 97,493.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,112.87 : 172,619.59 = 70,662.15 : x
  2. Step 2: Convert to fraction form
    125,112.87/172,619.59 = 70,662.15/x
  3. Step 3: Cross multiply
    125,112.87x = 172,619.59 × 70,662.15
  4. Step 4: Simplify right side
    125,112.87x = 12,197,671,361.52
  5. Step 5: Solve for x
    x = 12,197,671,361.52/125,112.87
  6. Step 6: Final answer
    x = 97,493.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.