Home / 74,411.83-102,689.43-40,420.98

Finding the Fourth Proportional to 74,411.83, 102,689.43 and 40,420.98

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Solution

The fourth proportional to 74,411.83, 102,689.43 and 40,420.98 is: 55,781.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,411.83 : 102,689.43 = 40,420.98 : x
  2. Step 2: Convert to fraction form
    74,411.83/102,689.43 = 40,420.98/x
  3. Step 3: Cross multiply
    74,411.83x = 102,689.43 × 40,420.98
  4. Step 4: Simplify right side
    74,411.83x = 4,150,807,396.24
  5. Step 5: Solve for x
    x = 4,150,807,396.24/74,411.83
  6. Step 6: Final answer
    x = 55,781.55

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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.