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Finding the Fourth Proportional to 245,585.28, 338,927.36 and 138,148.90

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Solution

The fourth proportional to 245,585.28, 338,927.36 and 138,148.90 is: 190,656.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,585.28 : 338,927.36 = 138,148.90 : x
  2. Step 2: Convert to fraction form
    245,585.28/338,927.36 = 138,148.90/x
  3. Step 3: Cross multiply
    245,585.28x = 338,927.36 × 138,148.90
  4. Step 4: Simplify right side
    245,585.28x = 46,822,441,963.90
  5. Step 5: Solve for x
    x = 46,822,441,963.90/245,585.28
  6. Step 6: Final answer
    x = 190,656.55

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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.