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Finding the Fourth Proportional to 207,316.30, 310,979.32 and 74,205.76

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Solution

The fourth proportional to 207,316.30, 310,979.32 and 74,205.76 is: 111,310.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,316.30 : 310,979.32 = 74,205.76 : x
  2. Step 2: Convert to fraction form
    207,316.30/310,979.32 = 74,205.76/x
  3. Step 3: Cross multiply
    207,316.30x = 310,979.32 × 74,205.76
  4. Step 4: Simplify right side
    207,316.30x = 23,076,456,784.88
  5. Step 5: Solve for x
    x = 23,076,456,784.88/207,316.30
  6. Step 6: Final answer
    x = 111,310.38

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1.5x scale

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.