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Finding the Fourth Proportional to 70,913.35, 106,370.03 and 39,420.55

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Solution

The fourth proportional to 70,913.35, 106,370.03 and 39,420.55 is: 59,130.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,913.35 : 106,370.03 = 39,420.55 : x
  2. Step 2: Convert to fraction form
    70,913.35/106,370.03 = 39,420.55/x
  3. Step 3: Cross multiply
    70,913.35x = 106,370.03 × 39,420.55
  4. Step 4: Simplify right side
    70,913.35x = 4,193,164,889.01
  5. Step 5: Solve for x
    x = 4,193,164,889.01/70,913.35
  6. Step 6: Final answer
    x = 59,130.83

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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.