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Finding the Fourth Proportional to 74,108.58, 102,328.80 and 68,441.25

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Solution

The fourth proportional to 74,108.58, 102,328.80 and 68,441.25 is: 94,503.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,108.58 : 102,328.80 = 68,441.25 : x
  2. Step 2: Convert to fraction form
    74,108.58/102,328.80 = 68,441.25/x
  3. Step 3: Cross multiply
    74,108.58x = 102,328.80 × 68,441.25
  4. Step 4: Simplify right side
    74,108.58x = 7,003,510,983
  5. Step 5: Solve for x
    x = 7,003,510,983/74,108.58
  6. Step 6: Final answer
    x = 94,503.38

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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.