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Finding the Fourth Proportional to 72,985.79, 109,507.64 and 26,242.31

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Solution

The fourth proportional to 72,985.79, 109,507.64 and 26,242.31 is: 39,373.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,985.79 : 109,507.64 = 26,242.31 : x
  2. Step 2: Convert to fraction form
    72,985.79/109,507.64 = 26,242.31/x
  3. Step 3: Cross multiply
    72,985.79x = 109,507.64 × 26,242.31
  4. Step 4: Simplify right side
    72,985.79x = 2,873,732,757.50
  5. Step 5: Solve for x
    x = 2,873,732,757.50/72,985.79
  6. Step 6: Final answer
    x = 39,373.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.