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Finding the Fourth Proportional to 65,386.86, 90,061.98 and 50,250.56

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Solution

The fourth proportional to 65,386.86, 90,061.98 and 50,250.56 is: 69,213.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,386.86 : 90,061.98 = 50,250.56 : x
  2. Step 2: Convert to fraction form
    65,386.86/90,061.98 = 50,250.56/x
  3. Step 3: Cross multiply
    65,386.86x = 90,061.98 × 50,250.56
  4. Step 4: Simplify right side
    65,386.86x = 4,525,664,479.40
  5. Step 5: Solve for x
    x = 4,525,664,479.40/65,386.86
  6. Step 6: Final answer
    x = 69,213.67

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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.