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Finding the Fourth Proportional to 248,415.16, 342,767.78 and 140,989.72

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Solution

The fourth proportional to 248,415.16, 342,767.78 and 140,989.72 is: 194,540.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,415.16 : 342,767.78 = 140,989.72 : x
  2. Step 2: Convert to fraction form
    248,415.16/342,767.78 = 140,989.72/x
  3. Step 3: Cross multiply
    248,415.16x = 342,767.78 × 140,989.72
  4. Step 4: Simplify right side
    248,415.16x = 48,326,733,327.22
  5. Step 5: Solve for x
    x = 48,326,733,327.22/248,415.16
  6. Step 6: Final answer
    x = 194,540.19

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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.