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Finding the Fourth Proportional to 92,985.88, 139,400.22 and 40,355.80

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Solution

The fourth proportional to 92,985.88, 139,400.22 and 40,355.80 is: 60,499.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,985.88 : 139,400.22 = 40,355.80 : x
  2. Step 2: Convert to fraction form
    92,985.88/139,400.22 = 40,355.80/x
  3. Step 3: Cross multiply
    92,985.88x = 139,400.22 × 40,355.80
  4. Step 4: Simplify right side
    92,985.88x = 5,625,607,398.28
  5. Step 5: Solve for x
    x = 5,625,607,398.28/92,985.88
  6. Step 6: Final answer
    x = 60,499.59

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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.