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Finding the Fourth Proportional to 67,790.99, 93,555 and 39,099.98

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Solution

The fourth proportional to 67,790.99, 93,555 and 39,099.98 is: 53,959.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,790.99 : 93,555 = 39,099.98 : x
  2. Step 2: Convert to fraction form
    67,790.99/93,555 = 39,099.98/x
  3. Step 3: Cross multiply
    67,790.99x = 93,555 × 39,099.98
  4. Step 4: Simplify right side
    67,790.99x = 3,657,998,628.90
  5. Step 5: Solve for x
    x = 3,657,998,628.90/67,790.99
  6. Step 6: Final answer
    x = 53,959.95

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1.5x scale

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.