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Finding the Fourth Proportional to 139,913.10, 209,755.29 and 65,079.90

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Solution

The fourth proportional to 139,913.10, 209,755.29 and 65,079.90 is: 97,566.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,913.10 : 209,755.29 = 65,079.90 : x
  2. Step 2: Convert to fraction form
    139,913.10/209,755.29 = 65,079.90/x
  3. Step 3: Cross multiply
    139,913.10x = 209,755.29 × 65,079.90
  4. Step 4: Simplify right side
    139,913.10x = 13,650,853,297.67
  5. Step 5: Solve for x
    x = 13,650,853,297.67/139,913.10
  6. Step 6: Final answer
    x = 97,566.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.