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Finding the Fourth Proportional to 100,977.12, 139,353.12 and 58,548.96

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Solution

The fourth proportional to 100,977.12, 139,353.12 and 58,548.96 is: 80,800.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,977.12 : 139,353.12 = 58,548.96 : x
  2. Step 2: Convert to fraction form
    100,977.12/139,353.12 = 58,548.96/x
  3. Step 3: Cross multiply
    100,977.12x = 139,353.12 × 58,548.96
  4. Step 4: Simplify right side
    100,977.12x = 8,158,980,248.76
  5. Step 5: Solve for x
    x = 8,158,980,248.76/100,977.12
  6. Step 6: Final answer
    x = 80,800.29

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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.