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Finding the Fourth Proportional to 103,695.56, 155,603.72 and 43,720.27

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Solution

The fourth proportional to 103,695.56, 155,603.72 and 43,720.27 is: 65,605.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,695.56 : 155,603.72 = 43,720.27 : x
  2. Step 2: Convert to fraction form
    103,695.56/155,603.72 = 43,720.27/x
  3. Step 3: Cross multiply
    103,695.56x = 155,603.72 × 43,720.27
  4. Step 4: Simplify right side
    103,695.56x = 6,803,037,001.04
  5. Step 5: Solve for x
    x = 6,803,037,001.04/103,695.56
  6. Step 6: Final answer
    x = 65,605.87

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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.