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Finding the Fourth Proportional to 70,192.85, 96,866.15 and 39,980.99

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Solution

The fourth proportional to 70,192.85, 96,866.15 and 39,980.99 is: 55,173.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,192.85 : 96,866.15 = 39,980.99 : x
  2. Step 2: Convert to fraction form
    70,192.85/96,866.15 = 39,980.99/x
  3. Step 3: Cross multiply
    70,192.85x = 96,866.15 × 39,980.99
  4. Step 4: Simplify right side
    70,192.85x = 3,872,804,616.75
  5. Step 5: Solve for x
    x = 3,872,804,616.75/70,192.85
  6. Step 6: Final answer
    x = 55,173.78

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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.