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Finding the Fourth Proportional to 245,888.66, 339,358.68 and 138,479.69

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Solution

The fourth proportional to 245,888.66, 339,358.68 and 138,479.69 is: 191,120.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,888.66 : 339,358.68 = 138,479.69 : x
  2. Step 2: Convert to fraction form
    245,888.66/339,358.68 = 138,479.69/x
  3. Step 3: Cross multiply
    245,888.66x = 339,358.68 × 138,479.69
  4. Step 4: Simplify right side
    245,888.66x = 46,994,283,108.42
  5. Step 5: Solve for x
    x = 46,994,283,108.42/245,888.66
  6. Step 6: Final answer
    x = 191,120.18

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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.