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Finding the Fourth Proportional to 86,908.45, 122,021.75 and 86,908.45

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Solution

The fourth proportional to 86,908.45, 122,021.75 and 86,908.45 is: 122,021.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,908.45 : 122,021.75 = 86,908.45 : x
  2. Step 2: Convert to fraction form
    86,908.45/122,021.75 = 86,908.45/x
  3. Step 3: Cross multiply
    86,908.45x = 122,021.75 × 86,908.45
  4. Step 4: Simplify right side
    86,908.45x = 10,604,721,158.79
  5. Step 5: Solve for x
    x = 10,604,721,158.79/86,908.45
  6. Step 6: Final answer
    x = 122,021.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.