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Finding the Fourth Proportional to 72,369, 108,555.63 and 61,772.21

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Solution

The fourth proportional to 72,369, 108,555.63 and 61,772.21 is: 92,660.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,369 : 108,555.63 = 61,772.21 : x
  2. Step 2: Convert to fraction form
    72,369/108,555.63 = 61,772.21/x
  3. Step 3: Cross multiply
    72,369x = 108,555.63 × 61,772.21
  4. Step 4: Simplify right side
    72,369x = 6,705,720,630.26
  5. Step 5: Solve for x
    x = 6,705,720,630.26/72,369
  6. Step 6: Final answer
    x = 92,660.13

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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.