Home / 56,631.02-78,149.14-31,137.41

Finding the Fourth Proportional to 56,631.02, 78,149.14 and 31,137.41

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Solution

The fourth proportional to 56,631.02, 78,149.14 and 31,137.41 is: 42,968.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,631.02 : 78,149.14 = 31,137.41 : x
  2. Step 2: Convert to fraction form
    56,631.02/78,149.14 = 31,137.41/x
  3. Step 3: Cross multiply
    56,631.02x = 78,149.14 × 31,137.41
  4. Step 4: Simplify right side
    56,631.02x = 2,433,361,930.86
  5. Step 5: Solve for x
    x = 2,433,361,930.86/56,631.02
  6. Step 6: Final answer
    x = 42,968.71

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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.