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Finding the Fourth Proportional to 65,334.80, 90,168.72 and 38,485.76

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Solution

The fourth proportional to 65,334.80, 90,168.72 and 38,485.76 is: 53,114.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,334.80 : 90,168.72 = 38,485.76 : x
  2. Step 2: Convert to fraction form
    65,334.80/90,168.72 = 38,485.76/x
  3. Step 3: Cross multiply
    65,334.80x = 90,168.72 × 38,485.76
  4. Step 4: Simplify right side
    65,334.80x = 3,470,211,717.43
  5. Step 5: Solve for x
    x = 3,470,211,717.43/65,334.80
  6. Step 6: Final answer
    x = 53,114.29

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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.