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Finding the Fourth Proportional to 77,115.80, 115,683.21 and 37,643.08

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Solution

The fourth proportional to 77,115.80, 115,683.21 and 37,643.08 is: 56,469.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,115.80 : 115,683.21 = 37,643.08 : x
  2. Step 2: Convert to fraction form
    77,115.80/115,683.21 = 37,643.08/x
  3. Step 3: Cross multiply
    77,115.80x = 115,683.21 × 37,643.08
  4. Step 4: Simplify right side
    77,115.80x = 4,354,672,328.69
  5. Step 5: Solve for x
    x = 4,354,672,328.69/77,115.80
  6. Step 6: Final answer
    x = 56,469.26

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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.