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Finding the Fourth Proportional to 245,588.34, 338,908.53 and 138,158.34

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Solution

The fourth proportional to 245,588.34, 338,908.53 and 138,158.34 is: 190,656.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,588.34 : 338,908.53 = 138,158.34 : x
  2. Step 2: Convert to fraction form
    245,588.34/338,908.53 = 138,158.34/x
  3. Step 3: Cross multiply
    245,588.34x = 338,908.53 × 138,158.34
  4. Step 4: Simplify right side
    245,588.34x = 46,823,039,916.64
  5. Step 5: Solve for x
    x = 46,823,039,916.64/245,588.34
  6. Step 6: Final answer
    x = 190,656.61

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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.