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Finding the Fourth Proportional to 91,428.49, 126,175.49 and 55,612.45

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Solution

The fourth proportional to 91,428.49, 126,175.49 and 55,612.45 is: 76,747.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,428.49 : 126,175.49 = 55,612.45 : x
  2. Step 2: Convert to fraction form
    91,428.49/126,175.49 = 55,612.45/x
  3. Step 3: Cross multiply
    91,428.49x = 126,175.49 × 55,612.45
  4. Step 4: Simplify right side
    91,428.49x = 7,016,928,128.85
  5. Step 5: Solve for x
    x = 7,016,928,128.85/91,428.49
  6. Step 6: Final answer
    x = 76,747.72

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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.