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Finding the Fourth Proportional to 316,656.54, 475,004.25 and 139,247.10

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Solution

The fourth proportional to 316,656.54, 475,004.25 and 139,247.10 is: 208,879.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,656.54 : 475,004.25 = 139,247.10 : x
  2. Step 2: Convert to fraction form
    316,656.54/475,004.25 = 139,247.10/x
  3. Step 3: Cross multiply
    316,656.54x = 475,004.25 × 139,247.10
  4. Step 4: Simplify right side
    316,656.54x = 66,142,964,300.18
  5. Step 5: Solve for x
    x = 66,142,964,300.18/316,656.54
  6. Step 6: Final answer
    x = 208,879.20

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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.