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Finding the Fourth Proportional to 101,352.45, 139,903.97 and 61,068.45

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Solution

The fourth proportional to 101,352.45, 139,903.97 and 61,068.45 is: 84,297.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,352.45 : 139,903.97 = 61,068.45 : x
  2. Step 2: Convert to fraction form
    101,352.45/139,903.97 = 61,068.45/x
  3. Step 3: Cross multiply
    101,352.45x = 139,903.97 × 61,068.45
  4. Step 4: Simplify right side
    101,352.45x = 8,543,718,291.40
  5. Step 5: Solve for x
    x = 8,543,718,291.40/101,352.45
  6. Step 6: Final answer
    x = 84,297.11

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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.