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Finding the Fourth Proportional to 136,990.04, 188,992.86 and 85,973

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Solution

The fourth proportional to 136,990.04, 188,992.86 and 85,973 is: 118,609.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,990.04 : 188,992.86 = 85,973 : x
  2. Step 2: Convert to fraction form
    136,990.04/188,992.86 = 85,973/x
  3. Step 3: Cross multiply
    136,990.04x = 188,992.86 × 85,973
  4. Step 4: Simplify right side
    136,990.04x = 16,248,283,152.78
  5. Step 5: Solve for x
    x = 16,248,283,152.78/136,990.04
  6. Step 6: Final answer
    x = 118,609.23

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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.