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Finding the Fourth Proportional to 104,037.90, 155,838.15 and 86,541.90

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Solution

The fourth proportional to 104,037.90, 155,838.15 and 86,541.90 is: 129,630.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,037.90 : 155,838.15 = 86,541.90 : x
  2. Step 2: Convert to fraction form
    104,037.90/155,838.15 = 86,541.90/x
  3. Step 3: Cross multiply
    104,037.90x = 155,838.15 × 86,541.90
  4. Step 4: Simplify right side
    104,037.90x = 13,486,529,593.49
  5. Step 5: Solve for x
    x = 13,486,529,593.49/104,037.90
  6. Step 6: Final answer
    x = 129,630.93

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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.