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Finding the Fourth Proportional to 133,110.90, 199,666.35 and 85,871.70

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Solution

The fourth proportional to 133,110.90, 199,666.35 and 85,871.70 is: 128,807.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,110.90 : 199,666.35 = 85,871.70 : x
  2. Step 2: Convert to fraction form
    133,110.90/199,666.35 = 85,871.70/x
  3. Step 3: Cross multiply
    133,110.90x = 199,666.35 × 85,871.70
  4. Step 4: Simplify right side
    133,110.90x = 17,145,688,907.30
  5. Step 5: Solve for x
    x = 17,145,688,907.30/133,110.90
  6. Step 6: Final answer
    x = 128,807.55

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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.