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Finding the Fourth Proportional to 99,991.94, 138,023.64 and 57,567.38

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Solution

The fourth proportional to 99,991.94, 138,023.64 and 57,567.38 is: 79,463.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,991.94 : 138,023.64 = 57,567.38 : x
  2. Step 2: Convert to fraction form
    99,991.94/138,023.64 = 57,567.38/x
  3. Step 3: Cross multiply
    99,991.94x = 138,023.64 × 57,567.38
  4. Step 4: Simplify right side
    99,991.94x = 7,945,659,332.86
  5. Step 5: Solve for x
    x = 7,945,659,332.86/99,991.94
  6. Step 6: Final answer
    x = 79,463.00

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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.