Home / 129,589,256-178,836,905.76-71,646,236.48

Finding the Fourth Proportional to 129,589,256, 178,836,905.76 and 71,646,236.48

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Solution

The fourth proportional to 129,589,256, 178,836,905.76 and 71,646,236.48 is: 98,873,869.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,589,256 : 178,836,905.76 = 71,646,236.48 : x
  2. Step 2: Convert to fraction form
    129,589,256/178,836,905.76 = 71,646,236.48/x
  3. Step 3: Cross multiply
    129,589,256x = 178,836,905.76 × 71,646,236.48
  4. Step 4: Simplify right side
    129,589,256x = 12,812,991,241,432,434
  5. Step 5: Solve for x
    x = 12,812,991,241,432,434/129,589,256
  6. Step 6: Final answer
    x = 98,873,869.93

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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.