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Finding the Fourth Proportional to 103,619.10, 155,428.65 and 95,745.90

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Solution

The fourth proportional to 103,619.10, 155,428.65 and 95,745.90 is: 143,618.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,619.10 : 155,428.65 = 95,745.90 : x
  2. Step 2: Convert to fraction form
    103,619.10/155,428.65 = 95,745.90/x
  3. Step 3: Cross multiply
    103,619.10x = 155,428.65 × 95,745.90
  4. Step 4: Simplify right side
    103,619.10x = 14,881,655,980.04
  5. Step 5: Solve for x
    x = 14,881,655,980.04/103,619.10
  6. Step 6: Final answer
    x = 143,618.85

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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.