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Finding the Fourth Proportional to 137,574.94, 206,362.40 and 90,816.88

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Solution

The fourth proportional to 137,574.94, 206,362.40 and 90,816.88 is: 136,225.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,574.94 : 206,362.40 = 90,816.88 : x
  2. Step 2: Convert to fraction form
    137,574.94/206,362.40 = 90,816.88/x
  3. Step 3: Cross multiply
    137,574.94x = 206,362.40 × 90,816.88
  4. Step 4: Simplify right side
    137,574.94x = 18,741,189,317.31
  5. Step 5: Solve for x
    x = 18,741,189,317.31/137,574.94
  6. Step 6: Final answer
    x = 136,225.31

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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.