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Finding the Fourth Proportional to 74,388.50, 102,656.94 and 40,854.50

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Solution

The fourth proportional to 74,388.50, 102,656.94 and 40,854.50 is: 56,379.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,388.50 : 102,656.94 = 40,854.50 : x
  2. Step 2: Convert to fraction form
    74,388.50/102,656.94 = 40,854.50/x
  3. Step 3: Cross multiply
    74,388.50x = 102,656.94 × 40,854.50
  4. Step 4: Simplify right side
    74,388.50x = 4,193,997,955.23
  5. Step 5: Solve for x
    x = 4,193,997,955.23/74,388.50
  6. Step 6: Final answer
    x = 56,379.65

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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.