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Finding the Fourth Proportional to 312,146.61, 430,761.65 and 168,906.60

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Solution

The fourth proportional to 312,146.61, 430,761.65 and 168,906.60 is: 233,090.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,146.61 : 430,761.65 = 168,906.60 : x
  2. Step 2: Convert to fraction form
    312,146.61/430,761.65 = 168,906.60/x
  3. Step 3: Cross multiply
    312,146.61x = 430,761.65 × 168,906.60
  4. Step 4: Simplify right side
    312,146.61x = 72,758,484,867.36
  5. Step 5: Solve for x
    x = 72,758,484,867.36/312,146.61
  6. Step 6: Final answer
    x = 233,090.74

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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.