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Finding the Fourth Proportional to 91,289.30, 125,979.87 and 51,004.76

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Solution

The fourth proportional to 91,289.30, 125,979.87 and 51,004.76 is: 70,386.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,289.30 : 125,979.87 = 51,004.76 : x
  2. Step 2: Convert to fraction form
    91,289.30/125,979.87 = 51,004.76/x
  3. Step 3: Cross multiply
    91,289.30x = 125,979.87 × 51,004.76
  4. Step 4: Simplify right side
    91,289.30x = 6,425,572,149.26
  5. Step 5: Solve for x
    x = 6,425,572,149.26/91,289.30
  6. Step 6: Final answer
    x = 70,386.92

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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.