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Finding the Fourth Proportional to 70,861.20, 97,789.20 and 39,030.32

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Solution

The fourth proportional to 70,861.20, 97,789.20 and 39,030.32 is: 53,862.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,861.20 : 97,789.20 = 39,030.32 : x
  2. Step 2: Convert to fraction form
    70,861.20/97,789.20 = 39,030.32/x
  3. Step 3: Cross multiply
    70,861.20x = 97,789.20 × 39,030.32
  4. Step 4: Simplify right side
    70,861.20x = 3,816,743,768.54
  5. Step 5: Solve for x
    x = 3,816,743,768.54/70,861.20
  6. Step 6: Final answer
    x = 53,862.25

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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.