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Finding the Fourth Proportional to 64,188.45, 96,291.87 and 19,818.99

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Solution

The fourth proportional to 64,188.45, 96,291.87 and 19,818.99 is: 29,731.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,188.45 : 96,291.87 = 19,818.99 : x
  2. Step 2: Convert to fraction form
    64,188.45/96,291.87 = 19,818.99/x
  3. Step 3: Cross multiply
    64,188.45x = 96,291.87 × 19,818.99
  4. Step 4: Simplify right side
    64,188.45x = 1,908,407,608.61
  5. Step 5: Solve for x
    x = 1,908,407,608.61/64,188.45
  6. Step 6: Final answer
    x = 29,731.32

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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.