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Finding the Fourth Proportional to 100,980.80, 151,528.80 and 69,838.40

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Solution

The fourth proportional to 100,980.80, 151,528.80 and 69,838.40 is: 104,797.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,980.80 : 151,528.80 = 69,838.40 : x
  2. Step 2: Convert to fraction form
    100,980.80/151,528.80 = 69,838.40/x
  3. Step 3: Cross multiply
    100,980.80x = 151,528.80 × 69,838.40
  4. Step 4: Simplify right side
    100,980.80x = 10,582,528,945.92
  5. Step 5: Solve for x
    x = 10,582,528,945.92/100,980.80
  6. Step 6: Final answer
    x = 104,797.44

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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.