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Finding the Fourth Proportional to 70,352.95, 105,534.93 and 20,433.88

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Solution

The fourth proportional to 70,352.95, 105,534.93 and 20,433.88 is: 30,652.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,352.95 : 105,534.93 = 20,433.88 : x
  2. Step 2: Convert to fraction form
    70,352.95/105,534.93 = 20,433.88/x
  3. Step 3: Cross multiply
    70,352.95x = 105,534.93 × 20,433.88
  4. Step 4: Simplify right side
    70,352.95x = 2,156,488,095.43
  5. Step 5: Solve for x
    x = 2,156,488,095.43/70,352.95
  6. Step 6: Final answer
    x = 30,652.42

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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.