Home / 57,153.79-78,872.16-31,660.15

Finding the Fourth Proportional to 57,153.79, 78,872.16 and 31,660.15

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Solution

The fourth proportional to 57,153.79, 78,872.16 and 31,660.15 is: 43,690.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,153.79 : 78,872.16 = 31,660.15 : x
  2. Step 2: Convert to fraction form
    57,153.79/78,872.16 = 31,660.15/x
  3. Step 3: Cross multiply
    57,153.79x = 78,872.16 × 31,660.15
  4. Step 4: Simplify right side
    57,153.79x = 2,497,104,416.42
  5. Step 5: Solve for x
    x = 2,497,104,416.42/57,153.79
  6. Step 6: Final answer
    x = 43,690.97

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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.