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Finding the Fourth Proportional to 85,362.64, 128,028.48 and 23,018.56

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Solution

The fourth proportional to 85,362.64, 128,028.48 and 23,018.56 is: 34,523.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,362.64 : 128,028.48 = 23,018.56 : x
  2. Step 2: Convert to fraction form
    85,362.64/128,028.48 = 23,018.56/x
  3. Step 3: Cross multiply
    85,362.64x = 128,028.48 × 23,018.56
  4. Step 4: Simplify right side
    85,362.64x = 2,947,031,248.59
  5. Step 5: Solve for x
    x = 2,947,031,248.59/85,362.64
  6. Step 6: Final answer
    x = 34,523.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.