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Finding the Fourth Proportional to 247,010.81, 340,870.43 and 139,578.53

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Solution

The fourth proportional to 247,010.81, 340,870.43 and 139,578.53 is: 192,615.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,010.81 : 340,870.43 = 139,578.53 : x
  2. Step 2: Convert to fraction form
    247,010.81/340,870.43 = 139,578.53/x
  3. Step 3: Cross multiply
    247,010.81x = 340,870.43 × 139,578.53
  4. Step 4: Simplify right side
    247,010.81x = 47,578,192,184.46
  5. Step 5: Solve for x
    x = 47,578,192,184.46/247,010.81
  6. Step 6: Final answer
    x = 192,615.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.