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Finding the Fourth Proportional to 154,872.21, 213,798.73 and 103,866.28

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Solution

The fourth proportional to 154,872.21, 213,798.73 and 103,866.28 is: 143,385.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,872.21 : 213,798.73 = 103,866.28 : x
  2. Step 2: Convert to fraction form
    154,872.21/213,798.73 = 103,866.28/x
  3. Step 3: Cross multiply
    154,872.21x = 213,798.73 × 103,866.28
  4. Step 4: Simplify right side
    154,872.21x = 22,206,478,753.82
  5. Step 5: Solve for x
    x = 22,206,478,753.82/154,872.21
  6. Step 6: Final answer
    x = 143,385.82

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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.