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Finding the Fourth Proportional to 57,018.56, 78,676.80 and 31,863.20

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Solution

The fourth proportional to 57,018.56, 78,676.80 and 31,863.20 is: 43,966.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,018.56 : 78,676.80 = 31,863.20 : x
  2. Step 2: Convert to fraction form
    57,018.56/78,676.80 = 31,863.20/x
  3. Step 3: Cross multiply
    57,018.56x = 78,676.80 × 31,863.20
  4. Step 4: Simplify right side
    57,018.56x = 2,506,894,613.76
  5. Step 5: Solve for x
    x = 2,506,894,613.76/57,018.56
  6. Step 6: Final answer
    x = 43,966.29

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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.