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Finding the Fourth Proportional to 52,459.87, 78,660.63 and 21,258.67

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Solution

The fourth proportional to 52,459.87, 78,660.63 and 21,258.67 is: 31,876.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,459.87 : 78,660.63 = 21,258.67 : x
  2. Step 2: Convert to fraction form
    52,459.87/78,660.63 = 21,258.67/x
  3. Step 3: Cross multiply
    52,459.87x = 78,660.63 × 21,258.67
  4. Step 4: Simplify right side
    52,459.87x = 1,672,220,375.16
  5. Step 5: Solve for x
    x = 1,672,220,375.16/52,459.87
  6. Step 6: Final answer
    x = 31,876.18

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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.