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Finding the Fourth Proportional to 74,639.80, 103,002.06 and 40,647.88

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Solution

The fourth proportional to 74,639.80, 103,002.06 and 40,647.88 is: 56,093.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,639.80 : 103,002.06 = 40,647.88 : x
  2. Step 2: Convert to fraction form
    74,639.80/103,002.06 = 40,647.88/x
  3. Step 3: Cross multiply
    74,639.80x = 103,002.06 × 40,647.88
  4. Step 4: Simplify right side
    74,639.80x = 4,186,815,374.63
  5. Step 5: Solve for x
    x = 4,186,815,374.63/74,639.80
  6. Step 6: Final answer
    x = 56,093.60

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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.