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Finding the Fourth Proportional to 71,019.05, 106,543.15 and 21,094.70

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Solution

The fourth proportional to 71,019.05, 106,543.15 and 21,094.70 is: 31,646.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,019.05 : 106,543.15 = 21,094.70 : x
  2. Step 2: Convert to fraction form
    71,019.05/106,543.15 = 21,094.70/x
  3. Step 3: Cross multiply
    71,019.05x = 106,543.15 × 21,094.70
  4. Step 4: Simplify right side
    71,019.05x = 2,247,495,200.85
  5. Step 5: Solve for x
    x = 2,247,495,200.85/71,019.05
  6. Step 6: Final answer
    x = 31,646.37

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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.