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Finding the Fourth Proportional to 70,625.12, 105,911.70 and 28,493.93

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Solution

The fourth proportional to 70,625.12, 105,911.70 and 28,493.93 is: 42,730.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,625.12 : 105,911.70 = 28,493.93 : x
  2. Step 2: Convert to fraction form
    70,625.12/105,911.70 = 28,493.93/x
  3. Step 3: Cross multiply
    70,625.12x = 105,911.70 × 28,493.93
  4. Step 4: Simplify right side
    70,625.12x = 3,017,840,565.98
  5. Step 5: Solve for x
    x = 3,017,840,565.98/70,625.12
  6. Step 6: Final answer
    x = 42,730.41

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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.