Home / 137,968.80-206,953.20-90,729.60

Finding the Fourth Proportional to 137,968.80, 206,953.20 and 90,729.60

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Solution

The fourth proportional to 137,968.80, 206,953.20 and 90,729.60 is: 136,094.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,968.80 : 206,953.20 = 90,729.60 : x
  2. Step 2: Convert to fraction form
    137,968.80/206,953.20 = 90,729.60/x
  3. Step 3: Cross multiply
    137,968.80x = 206,953.20 × 90,729.60
  4. Step 4: Simplify right side
    137,968.80x = 18,776,781,054.72
  5. Step 5: Solve for x
    x = 18,776,781,054.72/137,968.80
  6. Step 6: Final answer
    x = 136,094.40

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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.