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Finding the Fourth Proportional to 64,264.40, 96,403.80 and 19,890.80

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Solution

The fourth proportional to 64,264.40, 96,403.80 and 19,890.80 is: 29,838.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,264.40 : 96,403.80 = 19,890.80 : x
  2. Step 2: Convert to fraction form
    64,264.40/96,403.80 = 19,890.80/x
  3. Step 3: Cross multiply
    64,264.40x = 96,403.80 × 19,890.80
  4. Step 4: Simplify right side
    64,264.40x = 1,917,548,705.04
  5. Step 5: Solve for x
    x = 1,917,548,705.04/64,264.40
  6. Step 6: Final answer
    x = 29,838.43

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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.