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Finding the Fourth Proportional to 70,821.44, 97,732.80 and 38,989.68

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Solution

The fourth proportional to 70,821.44, 97,732.80 and 38,989.68 is: 53,805.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,821.44 : 97,732.80 = 38,989.68 : x
  2. Step 2: Convert to fraction form
    70,821.44/97,732.80 = 38,989.68/x
  3. Step 3: Cross multiply
    70,821.44x = 97,732.80 × 38,989.68
  4. Step 4: Simplify right side
    70,821.44x = 3,810,570,597.50
  5. Step 5: Solve for x
    x = 3,810,570,597.50/70,821.44
  6. Step 6: Final answer
    x = 53,805.33

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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.