Home / 70,945.20-97,905.12-39,115.23

Finding the Fourth Proportional to 70,945.20, 97,905.12 and 39,115.23

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Solution

The fourth proportional to 70,945.20, 97,905.12 and 39,115.23 is: 53,979.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,945.20 : 97,905.12 = 39,115.23 : x
  2. Step 2: Convert to fraction form
    70,945.20/97,905.12 = 39,115.23/x
  3. Step 3: Cross multiply
    70,945.20x = 97,905.12 × 39,115.23
  4. Step 4: Simplify right side
    70,945.20x = 3,829,581,727.46
  5. Step 5: Solve for x
    x = 3,829,581,727.46/70,945.20
  6. Step 6: Final answer
    x = 53,979.44

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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.