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Finding the Fourth Proportional to 207,415.70, 310,904.85 and 81,007.10

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Solution

The fourth proportional to 207,415.70, 310,904.85 and 81,007.10 is: 121,425.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,415.70 : 310,904.85 = 81,007.10 : x
  2. Step 2: Convert to fraction form
    207,415.70/310,904.85 = 81,007.10/x
  3. Step 3: Cross multiply
    207,415.70x = 310,904.85 × 81,007.10
  4. Step 4: Simplify right side
    207,415.70x = 25,185,500,274.44
  5. Step 5: Solve for x
    x = 25,185,500,274.44/207,415.70
  6. Step 6: Final answer
    x = 121,425.24

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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.