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Finding the Fourth Proportional to 71,000.70, 106,501.05 and 70,539.90

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Solution

The fourth proportional to 71,000.70, 106,501.05 and 70,539.90 is: 105,809.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,000.70 : 106,501.05 = 70,539.90 : x
  2. Step 2: Convert to fraction form
    71,000.70/106,501.05 = 70,539.90/x
  3. Step 3: Cross multiply
    71,000.70x = 106,501.05 × 70,539.90
  4. Step 4: Simplify right side
    71,000.70x = 7,512,573,416.90
  5. Step 5: Solve for x
    x = 7,512,573,416.90/71,000.70
  6. Step 6: Final answer
    x = 105,809.85

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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.