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Finding the Fourth Proportional to 43,108.55, 64,608 and 19,390.74

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Solution

The fourth proportional to 43,108.55, 64,608 and 19,390.74 is: 29,061.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,108.55 : 64,608 = 19,390.74 : x
  2. Step 2: Convert to fraction form
    43,108.55/64,608 = 19,390.74/x
  3. Step 3: Cross multiply
    43,108.55x = 64,608 × 19,390.74
  4. Step 4: Simplify right side
    43,108.55x = 1,252,796,929.92
  5. Step 5: Solve for x
    x = 1,252,796,929.92/43,108.55
  6. Step 6: Final answer
    x = 29,061.45

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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.