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Finding the Fourth Proportional to 91,286.57, 125,978.04 and 51,004.77

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Solution

The fourth proportional to 91,286.57, 125,978.04 and 51,004.77 is: 70,388.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,286.57 : 125,978.04 = 51,004.77 : x
  2. Step 2: Convert to fraction form
    91,286.57/125,978.04 = 51,004.77/x
  3. Step 3: Cross multiply
    91,286.57x = 125,978.04 × 51,004.77
  4. Step 4: Simplify right side
    91,286.57x = 6,425,480,482.83
  5. Step 5: Solve for x
    x = 6,425,480,482.83/91,286.57
  6. Step 6: Final answer
    x = 70,388.01

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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.