Home / 74,178.98-102,367.20-40,187.31

Finding the Fourth Proportional to 74,178.98, 102,367.20 and 40,187.31

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Solution

The fourth proportional to 74,178.98, 102,367.20 and 40,187.31 is: 55,458.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,178.98 : 102,367.20 = 40,187.31 : x
  2. Step 2: Convert to fraction form
    74,178.98/102,367.20 = 40,187.31/x
  3. Step 3: Cross multiply
    74,178.98x = 102,367.20 × 40,187.31
  4. Step 4: Simplify right side
    74,178.98x = 4,113,862,400.23
  5. Step 5: Solve for x
    x = 4,113,862,400.23/74,178.98
  6. Step 6: Final answer
    x = 55,458.60

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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.