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Finding the Fourth Proportional to 100,903.86, 139,247.31 and 58,486.99

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Solution

The fourth proportional to 100,903.86, 139,247.31 and 58,486.99 is: 80,712.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,903.86 : 139,247.31 = 58,486.99 : x
  2. Step 2: Convert to fraction form
    100,903.86/139,247.31 = 58,486.99/x
  3. Step 3: Cross multiply
    100,903.86x = 139,247.31 × 58,486.99
  4. Step 4: Simplify right side
    100,903.86x = 8,144,156,027.50
  5. Step 5: Solve for x
    x = 8,144,156,027.50/100,903.86
  6. Step 6: Final answer
    x = 80,712.04

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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.