Home / 103,309.08-155,046.64-53,403.78

Finding the Fourth Proportional to 103,309.08, 155,046.64 and 53,403.78

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Solution

The fourth proportional to 103,309.08, 155,046.64 and 53,403.78 is: 80,148.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,309.08 : 155,046.64 = 53,403.78 : x
  2. Step 2: Convert to fraction form
    103,309.08/155,046.64 = 53,403.78/x
  3. Step 3: Cross multiply
    103,309.08x = 155,046.64 × 53,403.78
  4. Step 4: Simplify right side
    103,309.08x = 8,280,076,652.30
  5. Step 5: Solve for x
    x = 8,280,076,652.30/103,309.08
  6. Step 6: Final answer
    x = 80,148.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.