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Finding the Fourth Proportional to 74,389.50, 102,664.40 and 40,861.98

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Solution

The fourth proportional to 74,389.50, 102,664.40 and 40,861.98 is: 56,393.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,389.50 : 102,664.40 = 40,861.98 : x
  2. Step 2: Convert to fraction form
    74,389.50/102,664.40 = 40,861.98/x
  3. Step 3: Cross multiply
    74,389.50x = 102,664.40 × 40,861.98
  4. Step 4: Simplify right side
    74,389.50x = 4,195,070,455.20
  5. Step 5: Solve for x
    x = 4,195,070,455.20/74,389.50
  6. Step 6: Final answer
    x = 56,393.31

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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.