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Finding the Fourth Proportional to 110,533.80, 165,800.70 and 68,543.40

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Solution

The fourth proportional to 110,533.80, 165,800.70 and 68,543.40 is: 102,815.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,533.80 : 165,800.70 = 68,543.40 : x
  2. Step 2: Convert to fraction form
    110,533.80/165,800.70 = 68,543.40/x
  3. Step 3: Cross multiply
    110,533.80x = 165,800.70 × 68,543.40
  4. Step 4: Simplify right side
    110,533.80x = 11,364,543,700.38
  5. Step 5: Solve for x
    x = 11,364,543,700.38/110,533.80
  6. Step 6: Final answer
    x = 102,815.10

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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.