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Finding the Fourth Proportional to 70,589.02, 105,860.04 and 28,458.22

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Solution

The fourth proportional to 70,589.02, 105,860.04 and 28,458.22 is: 42,677.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,589.02 : 105,860.04 = 28,458.22 : x
  2. Step 2: Convert to fraction form
    70,589.02/105,860.04 = 28,458.22/x
  3. Step 3: Cross multiply
    70,589.02x = 105,860.04 × 28,458.22
  4. Step 4: Simplify right side
    70,589.02x = 3,012,588,307.53
  5. Step 5: Solve for x
    x = 3,012,588,307.53/70,589.02
  6. Step 6: Final answer
    x = 42,677.86

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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.