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Finding the Fourth Proportional to 57,330.29, 85,978.83 and 19,888.85

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Solution

The fourth proportional to 57,330.29, 85,978.83 and 19,888.85 is: 29,827.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,330.29 : 85,978.83 = 19,888.85 : x
  2. Step 2: Convert to fraction form
    57,330.29/85,978.83 = 19,888.85/x
  3. Step 3: Cross multiply
    57,330.29x = 85,978.83 × 19,888.85
  4. Step 4: Simplify right side
    57,330.29x = 1,710,020,053.05
  5. Step 5: Solve for x
    x = 1,710,020,053.05/57,330.29
  6. Step 6: Final answer
    x = 29,827.51

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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.