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Finding the Fourth Proportional to 243,878.71, 336,565.70 and 136,442.32

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Solution

The fourth proportional to 243,878.71, 336,565.70 and 136,442.32 is: 188,297.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,878.71 : 336,565.70 = 136,442.32 : x
  2. Step 2: Convert to fraction form
    243,878.71/336,565.70 = 136,442.32/x
  3. Step 3: Cross multiply
    243,878.71x = 336,565.70 × 136,442.32
  4. Step 4: Simplify right side
    243,878.71x = 45,921,804,940.42
  5. Step 5: Solve for x
    x = 45,921,804,940.42/243,878.71
  6. Step 6: Final answer
    x = 188,297.72

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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.