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Finding the Fourth Proportional to 155,810.61, 215,018.49 and 84,190.61

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Solution

The fourth proportional to 155,810.61, 215,018.49 and 84,190.61 is: 116,182.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,810.61 : 215,018.49 = 84,190.61 : x
  2. Step 2: Convert to fraction form
    155,810.61/215,018.49 = 84,190.61/x
  3. Step 3: Cross multiply
    155,810.61x = 215,018.49 × 84,190.61
  4. Step 4: Simplify right side
    155,810.61x = 18,102,536,759.29
  5. Step 5: Solve for x
    x = 18,102,536,759.29/155,810.61
  6. Step 6: Final answer
    x = 116,182.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.