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Finding the Fourth Proportional to 91,889.79, 126,807.43 and 51,605.25

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Solution

The fourth proportional to 91,889.79, 126,807.43 and 51,605.25 is: 71,214.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,889.79 : 126,807.43 = 51,605.25 : x
  2. Step 2: Convert to fraction form
    91,889.79/126,807.43 = 51,605.25/x
  3. Step 3: Cross multiply
    91,889.79x = 126,807.43 × 51,605.25
  4. Step 4: Simplify right side
    91,889.79x = 6,543,929,127.01
  5. Step 5: Solve for x
    x = 6,543,929,127.01/91,889.79
  6. Step 6: Final answer
    x = 71,214.98

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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.