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Finding the Fourth Proportional to 245,876.71, 339,274.56 and 136,980.31

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Solution

The fourth proportional to 245,876.71, 339,274.56 and 136,980.31 is: 189,013.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,876.71 : 339,274.56 = 136,980.31 : x
  2. Step 2: Convert to fraction form
    245,876.71/339,274.56 = 136,980.31/x
  3. Step 3: Cross multiply
    245,876.71x = 339,274.56 × 136,980.31
  4. Step 4: Simplify right side
    245,876.71x = 46,473,934,403.91
  5. Step 5: Solve for x
    x = 46,473,934,403.91/245,876.71
  6. Step 6: Final answer
    x = 189,013.16

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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.