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Finding the Fourth Proportional to 70,610.88, 105,892.80 and 28,480.08

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Solution

The fourth proportional to 70,610.88, 105,892.80 and 28,480.08 is: 42,710.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,610.88 : 105,892.80 = 28,480.08 : x
  2. Step 2: Convert to fraction form
    70,610.88/105,892.80 = 28,480.08/x
  3. Step 3: Cross multiply
    70,610.88x = 105,892.80 × 28,480.08
  4. Step 4: Simplify right side
    70,610.88x = 3,015,835,415.42
  5. Step 5: Solve for x
    x = 3,015,835,415.42/70,610.88
  6. Step 6: Final answer
    x = 42,710.63

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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.