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Finding the Fourth Proportional to 70,267.88, 105,417.21 and 20,350.01

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Solution

The fourth proportional to 70,267.88, 105,417.21 and 20,350.01 is: 30,529.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,267.88 : 105,417.21 = 20,350.01 : x
  2. Step 2: Convert to fraction form
    70,267.88/105,417.21 = 20,350.01/x
  3. Step 3: Cross multiply
    70,267.88x = 105,417.21 × 20,350.01
  4. Step 4: Simplify right side
    70,267.88x = 2,145,241,277.67
  5. Step 5: Solve for x
    x = 2,145,241,277.67/70,267.88
  6. Step 6: Final answer
    x = 30,529.47

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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.