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Finding the Fourth Proportional to 91,991.91, 126,959.36 and 51,160.11

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Solution

The fourth proportional to 91,991.91, 126,959.36 and 51,160.11 is: 70,606.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,991.91 : 126,959.36 = 51,160.11 : x
  2. Step 2: Convert to fraction form
    91,991.91/126,959.36 = 51,160.11/x
  3. Step 3: Cross multiply
    91,991.91x = 126,959.36 × 51,160.11
  4. Step 4: Simplify right side
    91,991.91x = 6,495,254,567.33
  5. Step 5: Solve for x
    x = 6,495,254,567.33/91,991.91
  6. Step 6: Final answer
    x = 70,606.80

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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.