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Finding the Fourth Proportional to 92,505.61, 138,675.34 and 76,811.50

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Solution

The fourth proportional to 92,505.61, 138,675.34 and 76,811.50 is: 115,148.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,505.61 : 138,675.34 = 76,811.50 : x
  2. Step 2: Convert to fraction form
    92,505.61/138,675.34 = 76,811.50/x
  3. Step 3: Cross multiply
    92,505.61x = 138,675.34 × 76,811.50
  4. Step 4: Simplify right side
    92,505.61x = 10,651,860,878.41
  5. Step 5: Solve for x
    x = 10,651,860,878.41/92,505.61
  6. Step 6: Final answer
    x = 115,148.27

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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.