Home / 67,405.20-93,037.68-39,120

Finding the Fourth Proportional to 67,405.20, 93,037.68 and 39,120

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Solution

The fourth proportional to 67,405.20, 93,037.68 and 39,120 is: 53,996.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,405.20 : 93,037.68 = 39,120 : x
  2. Step 2: Convert to fraction form
    67,405.20/93,037.68 = 39,120/x
  3. Step 3: Cross multiply
    67,405.20x = 93,037.68 × 39,120
  4. Step 4: Simplify right side
    67,405.20x = 3,639,634,041.60
  5. Step 5: Solve for x
    x = 3,639,634,041.60/67,405.20
  6. Step 6: Final answer
    x = 53,996.34

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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.