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Finding the Fourth Proportional to 248,290.31, 342,616.96 and 139,369.71

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Solution

The fourth proportional to 248,290.31, 342,616.96 and 139,369.71 is: 192,316.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,290.31 : 342,616.96 = 139,369.71 : x
  2. Step 2: Convert to fraction form
    248,290.31/342,616.96 = 139,369.71/x
  3. Step 3: Cross multiply
    248,290.31x = 342,616.96 × 139,369.71
  4. Step 4: Simplify right side
    248,290.31x = 47,750,425,818.67
  5. Step 5: Solve for x
    x = 47,750,425,818.67/248,290.31
  6. Step 6: Final answer
    x = 192,316.91

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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.