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Finding the Fourth Proportional to 86,989.84, 120,103.81 and 66,810.67

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Solution

The fourth proportional to 86,989.84, 120,103.81 and 66,810.67 is: 92,243.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,989.84 : 120,103.81 = 66,810.67 : x
  2. Step 2: Convert to fraction form
    86,989.84/120,103.81 = 66,810.67/x
  3. Step 3: Cross multiply
    86,989.84x = 120,103.81 × 66,810.67
  4. Step 4: Simplify right side
    86,989.84x = 8,024,215,548.37
  5. Step 5: Solve for x
    x = 8,024,215,548.37/86,989.84
  6. Step 6: Final answer
    x = 92,243.14

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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.