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Finding the Fourth Proportional to 109,047.20, 163,570.80 and 103,215.20

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Solution

The fourth proportional to 109,047.20, 163,570.80 and 103,215.20 is: 154,822.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,047.20 : 163,570.80 = 103,215.20 : x
  2. Step 2: Convert to fraction form
    109,047.20/163,570.80 = 103,215.20/x
  3. Step 3: Cross multiply
    109,047.20x = 163,570.80 × 103,215.20
  4. Step 4: Simplify right side
    109,047.20x = 16,882,992,836.16
  5. Step 5: Solve for x
    x = 16,882,992,836.16/109,047.20
  6. Step 6: Final answer
    x = 154,822.80

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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.