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Finding the Fourth Proportional to 316,790.45, 475,128.27 and 127,243.16

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Solution

The fourth proportional to 316,790.45, 475,128.27 and 127,243.16 is: 190,841.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,790.45 : 475,128.27 = 127,243.16 : x
  2. Step 2: Convert to fraction form
    316,790.45/475,128.27 = 127,243.16/x
  3. Step 3: Cross multiply
    316,790.45x = 475,128.27 × 127,243.16
  4. Step 4: Simplify right side
    316,790.45x = 60,456,822,480.13
  5. Step 5: Solve for x
    x = 60,456,822,480.13/316,790.45
  6. Step 6: Final answer
    x = 190,841.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.