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Finding the Fourth Proportional to 70,675.79, 105,997.48 and 42,220.76

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Solution

The fourth proportional to 70,675.79, 105,997.48 and 42,220.76 is: 63,321.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,675.79 : 105,997.48 = 42,220.76 : x
  2. Step 2: Convert to fraction form
    70,675.79/105,997.48 = 42,220.76/x
  3. Step 3: Cross multiply
    70,675.79x = 105,997.48 × 42,220.76
  4. Step 4: Simplify right side
    70,675.79x = 4,475,294,163.68
  5. Step 5: Solve for x
    x = 4,475,294,163.68/70,675.79
  6. Step 6: Final answer
    x = 63,321.46

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1.5x scale

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.