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Finding the Fourth Proportional to 69,865, 96,420.99 and 39,658.48

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Solution

The fourth proportional to 69,865, 96,420.99 and 39,658.48 is: 54,732.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,865 : 96,420.99 = 39,658.48 : x
  2. Step 2: Convert to fraction form
    69,865/96,420.99 = 39,658.48/x
  3. Step 3: Cross multiply
    69,865x = 96,420.99 × 39,658.48
  4. Step 4: Simplify right side
    69,865x = 3,823,909,903.50
  5. Step 5: Solve for x
    x = 3,823,909,903.50/69,865
  6. Step 6: Final answer
    x = 54,732.84

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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.