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Finding the Fourth Proportional to 104,064.90, 155,878.65 and 86,568.90

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Solution

The fourth proportional to 104,064.90, 155,878.65 and 86,568.90 is: 129,671.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,064.90 : 155,878.65 = 86,568.90 : x
  2. Step 2: Convert to fraction form
    104,064.90/155,878.65 = 86,568.90/x
  3. Step 3: Cross multiply
    104,064.90x = 155,878.65 × 86,568.90
  4. Step 4: Simplify right side
    104,064.90x = 13,494,243,263.99
  5. Step 5: Solve for x
    x = 13,494,243,263.99/104,064.90
  6. Step 6: Final answer
    x = 129,671.42

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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.