Home / 103,307.08-155,043.64-53,401.78

Finding the Fourth Proportional to 103,307.08, 155,043.64 and 53,401.78

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Solution

The fourth proportional to 103,307.08, 155,043.64 and 53,401.78 is: 80,145.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,307.08 : 155,043.64 = 53,401.78 : x
  2. Step 2: Convert to fraction form
    103,307.08/155,043.64 = 53,401.78/x
  3. Step 3: Cross multiply
    103,307.08x = 155,043.64 × 53,401.78
  4. Step 4: Simplify right side
    103,307.08x = 8,279,606,353.68
  5. Step 5: Solve for x
    x = 8,279,606,353.68/103,307.08
  6. Step 6: Final answer
    x = 80,145.58

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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.