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Finding the Fourth Proportional to 154,911.12, 213,793.73 and 86,946.45

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Solution

The fourth proportional to 154,911.12, 213,793.73 and 86,946.45 is: 119,995.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,911.12 : 213,793.73 = 86,946.45 : x
  2. Step 2: Convert to fraction form
    154,911.12/213,793.73 = 86,946.45/x
  3. Step 3: Cross multiply
    154,911.12x = 213,793.73 × 86,946.45
  4. Step 4: Simplify right side
    154,911.12x = 18,588,605,855.76
  5. Step 5: Solve for x
    x = 18,588,605,855.76/154,911.12
  6. Step 6: Final answer
    x = 119,995.30

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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.