Home / 64,749.20-89,361-40,874.64

Finding the Fourth Proportional to 64,749.20, 89,361 and 40,874.64

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Solution

The fourth proportional to 64,749.20, 89,361 and 40,874.64 is: 56,411.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,749.20 : 89,361 = 40,874.64 : x
  2. Step 2: Convert to fraction form
    64,749.20/89,361 = 40,874.64/x
  3. Step 3: Cross multiply
    64,749.20x = 89,361 × 40,874.64
  4. Step 4: Simplify right side
    64,749.20x = 3,652,598,705.04
  5. Step 5: Solve for x
    x = 3,652,598,705.04/64,749.20
  6. Step 6: Final answer
    x = 56,411.49

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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.