Home / 189,879.15-284,569.56-139,724.40

Finding the Fourth Proportional to 189,879.15, 284,569.56 and 139,724.40

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Solution

The fourth proportional to 189,879.15, 284,569.56 and 139,724.40 is: 209,403.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,879.15 : 284,569.56 = 139,724.40 : x
  2. Step 2: Convert to fraction form
    189,879.15/284,569.56 = 139,724.40/x
  3. Step 3: Cross multiply
    189,879.15x = 284,569.56 × 139,724.40
  4. Step 4: Simplify right side
    189,879.15x = 39,761,311,029.26
  5. Step 5: Solve for x
    x = 39,761,311,029.26/189,879.15
  6. Step 6: Final answer
    x = 209,403.25

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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.