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Finding the Fourth Proportional to 92,909.35, 128,268.09 and 61,170.50

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Solution

The fourth proportional to 92,909.35, 128,268.09 and 61,170.50 is: 84,450.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,909.35 : 128,268.09 = 61,170.50 : x
  2. Step 2: Convert to fraction form
    92,909.35/128,268.09 = 61,170.50/x
  3. Step 3: Cross multiply
    92,909.35x = 128,268.09 × 61,170.50
  4. Step 4: Simplify right side
    92,909.35x = 7,846,223,199.35
  5. Step 5: Solve for x
    x = 7,846,223,199.35/92,909.35
  6. Step 6: Final answer
    x = 84,450.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.