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Finding the Fourth Proportional to 72,795.72, 109,211.71 and 57,859.20

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Solution

The fourth proportional to 72,795.72, 109,211.71 and 57,859.20 is: 86,803.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,795.72 : 109,211.71 = 57,859.20 : x
  2. Step 2: Convert to fraction form
    72,795.72/109,211.71 = 57,859.20/x
  3. Step 3: Cross multiply
    72,795.72x = 109,211.71 × 57,859.20
  4. Step 4: Simplify right side
    72,795.72x = 6,318,902,135.07
  5. Step 5: Solve for x
    x = 6,318,902,135.07/72,795.72
  6. Step 6: Final answer
    x = 86,803.21

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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.