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Finding the Fourth Proportional to 100,980, 139,352.44 and 58,563.12

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Solution

The fourth proportional to 100,980, 139,352.44 and 58,563.12 is: 80,817.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,980 : 139,352.44 = 58,563.12 : x
  2. Step 2: Convert to fraction form
    100,980/139,352.44 = 58,563.12/x
  3. Step 3: Cross multiply
    100,980x = 139,352.44 × 58,563.12
  4. Step 4: Simplify right side
    100,980x = 8,160,913,666.01
  5. Step 5: Solve for x
    x = 8,160,913,666.01/100,980
  6. Step 6: Final answer
    x = 80,817.13

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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.