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Finding the Fourth Proportional to 70,108.70, 105,163.05 and 54,362.30

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Solution

The fourth proportional to 70,108.70, 105,163.05 and 54,362.30 is: 81,543.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,108.70 : 105,163.05 = 54,362.30 : x
  2. Step 2: Convert to fraction form
    70,108.70/105,163.05 = 54,362.30/x
  3. Step 3: Cross multiply
    70,108.70x = 105,163.05 × 54,362.30
  4. Step 4: Simplify right side
    70,108.70x = 5,716,905,273.02
  5. Step 5: Solve for x
    x = 5,716,905,273.02/70,108.70
  6. Step 6: Final answer
    x = 81,543.45

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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.