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Finding the Fourth Proportional to 100,895.01, 139,235.11 and 58,478.15

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Solution

The fourth proportional to 100,895.01, 139,235.11 and 58,478.15 is: 80,699.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,895.01 : 139,235.11 = 58,478.15 : x
  2. Step 2: Convert to fraction form
    100,895.01/139,235.11 = 58,478.15/x
  3. Step 3: Cross multiply
    100,895.01x = 139,235.11 × 58,478.15
  4. Step 4: Simplify right side
    100,895.01x = 8,142,210,659.28
  5. Step 5: Solve for x
    x = 8,142,210,659.28/100,895.01
  6. Step 6: Final answer
    x = 80,699.83

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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.