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Finding the Fourth Proportional to 239,653.63, 330,751.31 and 137,678.91

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Solution

The fourth proportional to 239,653.63, 330,751.31 and 137,678.91 is: 190,013.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,653.63 : 330,751.31 = 137,678.91 : x
  2. Step 2: Convert to fraction form
    239,653.63/330,751.31 = 137,678.91/x
  3. Step 3: Cross multiply
    239,653.63x = 330,751.31 × 137,678.91
  4. Step 4: Simplify right side
    239,653.63x = 45,537,477,913.16
  5. Step 5: Solve for x
    x = 45,537,477,913.16/239,653.63
  6. Step 6: Final answer
    x = 190,013.72

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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.