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Finding the Fourth Proportional to 91,908.61, 126,824.93 and 51,613.21

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Solution

The fourth proportional to 91,908.61, 126,824.93 and 51,613.21 is: 71,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,908.61 : 126,824.93 = 51,613.21 : x
  2. Step 2: Convert to fraction form
    91,908.61/126,824.93 = 51,613.21/x
  3. Step 3: Cross multiply
    91,908.61x = 126,824.93 × 51,613.21
  4. Step 4: Simplify right side
    91,908.61x = 6,545,841,487.26
  5. Step 5: Solve for x
    x = 6,545,841,487.26/91,908.61
  6. Step 6: Final answer
    x = 71,221.20

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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.