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Finding the Fourth Proportional to 70,234.95, 105,352.51 and 28,681.95

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Solution

The fourth proportional to 70,234.95, 105,352.51 and 28,681.95 is: 43,022.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,234.95 : 105,352.51 = 28,681.95 : x
  2. Step 2: Convert to fraction form
    70,234.95/105,352.51 = 28,681.95/x
  3. Step 3: Cross multiply
    70,234.95x = 105,352.51 × 28,681.95
  4. Step 4: Simplify right side
    70,234.95x = 3,021,715,424.19
  5. Step 5: Solve for x
    x = 3,021,715,424.19/70,234.95
  6. Step 6: Final answer
    x = 43,022.96

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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.