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Finding the Fourth Proportional to 73,170.98, 109,756.45 and 20,580.47

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Solution

The fourth proportional to 73,170.98, 109,756.45 and 20,580.47 is: 30,870.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,170.98 : 109,756.45 = 20,580.47 : x
  2. Step 2: Convert to fraction form
    73,170.98/109,756.45 = 20,580.47/x
  3. Step 3: Cross multiply
    73,170.98x = 109,756.45 × 20,580.47
  4. Step 4: Simplify right side
    73,170.98x = 2,258,839,326.53
  5. Step 5: Solve for x
    x = 2,258,839,326.53/73,170.98
  6. Step 6: Final answer
    x = 30,870.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.