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Finding the Fourth Proportional to 70,440.88, 105,677.70 and 20,526.28

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Solution

The fourth proportional to 70,440.88, 105,677.70 and 20,526.28 is: 30,794.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,440.88 : 105,677.70 = 20,526.28 : x
  2. Step 2: Convert to fraction form
    70,440.88/105,677.70 = 20,526.28/x
  3. Step 3: Cross multiply
    70,440.88x = 105,677.70 × 20,526.28
  4. Step 4: Simplify right side
    70,440.88x = 2,169,170,059.96
  5. Step 5: Solve for x
    x = 2,169,170,059.96/70,440.88
  6. Step 6: Final answer
    x = 30,794.19

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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.