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Finding the Fourth Proportional to 125,316.42, 172,936.86 and 68,728.20

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Solution

The fourth proportional to 125,316.42, 172,936.86 and 68,728.20 is: 94,845.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,316.42 : 172,936.86 = 68,728.20 : x
  2. Step 2: Convert to fraction form
    125,316.42/172,936.86 = 68,728.20/x
  3. Step 3: Cross multiply
    125,316.42x = 172,936.86 × 68,728.20
  4. Step 4: Simplify right side
    125,316.42x = 11,885,639,101.45
  5. Step 5: Solve for x
    x = 11,885,639,101.45/125,316.42
  6. Step 6: Final answer
    x = 94,845.03

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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.