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Finding the Fourth Proportional to 245,590.50, 338,916.51 and 138,159.66

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Solution

The fourth proportional to 245,590.50, 338,916.51 and 138,159.66 is: 190,661.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,590.50 : 338,916.51 = 138,159.66 : x
  2. Step 2: Convert to fraction form
    245,590.50/338,916.51 = 138,159.66/x
  3. Step 3: Cross multiply
    245,590.50x = 338,916.51 × 138,159.66
  4. Step 4: Simplify right side
    245,590.50x = 46,824,589,789.99
  5. Step 5: Solve for x
    x = 46,824,589,789.99/245,590.50
  6. Step 6: Final answer
    x = 190,661.24

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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.