Home / 129,270.64-178,350.60-105,356.20

Finding the Fourth Proportional to 129,270.64, 178,350.60 and 105,356.20

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Solution

The fourth proportional to 129,270.64, 178,350.60 and 105,356.20 is: 145,356.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,270.64 : 178,350.60 = 105,356.20 : x
  2. Step 2: Convert to fraction form
    129,270.64/178,350.60 = 105,356.20/x
  3. Step 3: Cross multiply
    129,270.64x = 178,350.60 × 105,356.20
  4. Step 4: Simplify right side
    129,270.64x = 18,790,341,483.72
  5. Step 5: Solve for x
    x = 18,790,341,483.72/129,270.64
  6. Step 6: Final answer
    x = 145,356.61

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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.