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Finding the Fourth Proportional to 230,889.72, 318,624.79 and 128,916.92

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Solution

The fourth proportional to 230,889.72, 318,624.79 and 128,916.92 is: 177,903.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,889.72 : 318,624.79 = 128,916.92 : x
  2. Step 2: Convert to fraction form
    230,889.72/318,624.79 = 128,916.92/x
  3. Step 3: Cross multiply
    230,889.72x = 318,624.79 × 128,916.92
  4. Step 4: Simplify right side
    230,889.72x = 41,076,126,562.45
  5. Step 5: Solve for x
    x = 41,076,126,562.45/230,889.72
  6. Step 6: Final answer
    x = 177,903.66

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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.