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Finding the Fourth Proportional to 92,840.68, 128,120.70 and 50,399.20

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Solution

The fourth proportional to 92,840.68, 128,120.70 and 50,399.20 is: 69,551.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,840.68 : 128,120.70 = 50,399.20 : x
  2. Step 2: Convert to fraction form
    92,840.68/128,120.70 = 50,399.20/x
  3. Step 3: Cross multiply
    92,840.68x = 128,120.70 × 50,399.20
  4. Step 4: Simplify right side
    92,840.68x = 6,457,180,783.44
  5. Step 5: Solve for x
    x = 6,457,180,783.44/92,840.68
  6. Step 6: Final answer
    x = 69,551.20

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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.