Home / 67,400.20-93,030.78-39,115

Finding the Fourth Proportional to 67,400.20, 93,030.78 and 39,115

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Solution

The fourth proportional to 67,400.20, 93,030.78 and 39,115 is: 53,989.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,400.20 : 93,030.78 = 39,115 : x
  2. Step 2: Convert to fraction form
    67,400.20/93,030.78 = 39,115/x
  3. Step 3: Cross multiply
    67,400.20x = 93,030.78 × 39,115
  4. Step 4: Simplify right side
    67,400.20x = 3,638,898,959.70
  5. Step 5: Solve for x
    x = 3,638,898,959.70/67,400.20
  6. Step 6: Final answer
    x = 53,989.44

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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.