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Finding the Fourth Proportional to 245,622.38, 338,955.40 and 138,192.15

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Solution

The fourth proportional to 245,622.38, 338,955.40 and 138,192.15 is: 190,703.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,622.38 : 338,955.40 = 138,192.15 : x
  2. Step 2: Convert to fraction form
    245,622.38/338,955.40 = 138,192.15/x
  3. Step 3: Cross multiply
    245,622.38x = 338,955.40 × 138,192.15
  4. Step 4: Simplify right side
    245,622.38x = 46,840,975,480.11
  5. Step 5: Solve for x
    x = 46,840,975,480.11/245,622.38
  6. Step 6: Final answer
    x = 190,703.21

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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.