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Finding the Fourth Proportional to 101,112.98, 139,511.03 and 61,812.08

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Solution

The fourth proportional to 101,112.98, 139,511.03 and 61,812.08 is: 85,285.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,112.98 : 139,511.03 = 61,812.08 : x
  2. Step 2: Convert to fraction form
    101,112.98/139,511.03 = 61,812.08/x
  3. Step 3: Cross multiply
    101,112.98x = 139,511.03 × 61,812.08
  4. Step 4: Simplify right side
    101,112.98x = 8,623,466,888.46
  5. Step 5: Solve for x
    x = 8,623,466,888.46/101,112.98
  6. Step 6: Final answer
    x = 85,285.46

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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.