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Finding the Fourth Proportional to 230,386.80, 317,895.22 and 128,389.88

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Solution

The fourth proportional to 230,386.80, 317,895.22 and 128,389.88 is: 177,156.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,386.80 : 317,895.22 = 128,389.88 : x
  2. Step 2: Convert to fraction form
    230,386.80/317,895.22 = 128,389.88/x
  3. Step 3: Cross multiply
    230,386.80x = 317,895.22 × 128,389.88
  4. Step 4: Simplify right side
    230,386.80x = 40,814,529,148.37
  5. Step 5: Solve for x
    x = 40,814,529,148.37/230,386.80
  6. Step 6: Final answer
    x = 177,156.54

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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.