Home / 129,639.55-178,985.16-105,822.85

Finding the Fourth Proportional to 129,639.55, 178,985.16 and 105,822.85

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Solution

The fourth proportional to 129,639.55, 178,985.16 and 105,822.85 is: 146,102.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,639.55 : 178,985.16 = 105,822.85 : x
  2. Step 2: Convert to fraction form
    129,639.55/178,985.16 = 105,822.85/x
  3. Step 3: Cross multiply
    129,639.55x = 178,985.16 × 105,822.85
  4. Step 4: Simplify right side
    129,639.55x = 18,940,719,738.91
  5. Step 5: Solve for x
    x = 18,940,719,738.91/129,639.55
  6. Step 6: Final answer
    x = 146,102.94

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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.