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Finding the Fourth Proportional to 100,907.52, 139,252.34 and 58,490.64

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Solution

The fourth proportional to 100,907.52, 139,252.34 and 58,490.64 is: 80,717.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,907.52 : 139,252.34 = 58,490.64 : x
  2. Step 2: Convert to fraction form
    100,907.52/139,252.34 = 58,490.64/x
  3. Step 3: Cross multiply
    100,907.52x = 139,252.34 × 58,490.64
  4. Step 4: Simplify right side
    100,907.52x = 8,144,958,488.10
  5. Step 5: Solve for x
    x = 8,144,958,488.10/100,907.52
  6. Step 6: Final answer
    x = 80,717.06

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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.