Home / 91,431.49-126,169.53-51,138.28

Finding the Fourth Proportional to 91,431.49, 126,169.53 and 51,138.28

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Solution

The fourth proportional to 91,431.49, 126,169.53 and 51,138.28 is: 70,567.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,431.49 : 126,169.53 = 51,138.28 : x
  2. Step 2: Convert to fraction form
    91,431.49/126,169.53 = 51,138.28/x
  3. Step 3: Cross multiply
    91,431.49x = 126,169.53 × 51,138.28
  4. Step 4: Simplify right side
    91,431.49x = 6,452,092,752.61
  5. Step 5: Solve for x
    x = 6,452,092,752.61/91,431.49
  6. Step 6: Final answer
    x = 70,567.51

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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.