Home / 102,997.75-142,139.10-58,285.75

Finding the Fourth Proportional to 102,997.75, 142,139.10 and 58,285.75

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Solution

The fourth proportional to 102,997.75, 142,139.10 and 58,285.75 is: 80,435.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,997.75 : 142,139.10 = 58,285.75 : x
  2. Step 2: Convert to fraction form
    102,997.75/142,139.10 = 58,285.75/x
  3. Step 3: Cross multiply
    102,997.75x = 142,139.10 × 58,285.75
  4. Step 4: Simplify right side
    102,997.75x = 8,284,684,047.83
  5. Step 5: Solve for x
    x = 8,284,684,047.83/102,997.75
  6. Step 6: Final answer
    x = 80,435.58

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1.5x scale

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.