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Finding the Fourth Proportional to 100,958.60, 139,320.96 and 58,521.08

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Solution

The fourth proportional to 100,958.60, 139,320.96 and 58,521.08 is: 80,757.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,958.60 : 139,320.96 = 58,521.08 : x
  2. Step 2: Convert to fraction form
    100,958.60/139,320.96 = 58,521.08/x
  3. Step 3: Cross multiply
    100,958.60x = 139,320.96 × 58,521.08
  4. Step 4: Simplify right side
    100,958.60x = 8,153,213,045.84
  5. Step 5: Solve for x
    x = 8,153,213,045.84/100,958.60
  6. Step 6: Final answer
    x = 80,757.98

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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.