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Finding the Fourth Proportional to 230,514.69, 318,108.92 and 128,541.36

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Solution

The fourth proportional to 230,514.69, 318,108.92 and 128,541.36 is: 177,386.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,514.69 : 318,108.92 = 128,541.36 : x
  2. Step 2: Convert to fraction form
    230,514.69/318,108.92 = 128,541.36/x
  3. Step 3: Cross multiply
    230,514.69x = 318,108.92 × 128,541.36
  4. Step 4: Simplify right side
    230,514.69x = 40,890,152,562.22
  5. Step 5: Solve for x
    x = 40,890,152,562.22/230,514.69
  6. Step 6: Final answer
    x = 177,386.32

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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.