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Finding the Fourth Proportional to 86,913.20, 122,028.40 and 86,913.20

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Solution

The fourth proportional to 86,913.20, 122,028.40 and 86,913.20 is: 122,028.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,913.20 : 122,028.40 = 86,913.20 : x
  2. Step 2: Convert to fraction form
    86,913.20/122,028.40 = 86,913.20/x
  3. Step 3: Cross multiply
    86,913.20x = 122,028.40 × 86,913.20
  4. Step 4: Simplify right side
    86,913.20x = 10,605,878,734.88
  5. Step 5: Solve for x
    x = 10,605,878,734.88/86,913.20
  6. Step 6: Final answer
    x = 122,028.40

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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.