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Finding the Fourth Proportional to 70,999.92, 97,980.24 and 39,168.78

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Solution

The fourth proportional to 70,999.92, 97,980.24 and 39,168.78 is: 54,053.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,999.92 : 97,980.24 = 39,168.78 : x
  2. Step 2: Convert to fraction form
    70,999.92/97,980.24 = 39,168.78/x
  3. Step 3: Cross multiply
    70,999.92x = 97,980.24 × 39,168.78
  4. Step 4: Simplify right side
    70,999.92x = 3,837,766,464.91
  5. Step 5: Solve for x
    x = 3,837,766,464.91/70,999.92
  6. Step 6: Final answer
    x = 54,053.11

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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.