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Finding the Fourth Proportional to 87,078.76, 130,676.38 and 31,674.76

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Solution

The fourth proportional to 87,078.76, 130,676.38 and 31,674.76 is: 47,533.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,078.76 : 130,676.38 = 31,674.76 : x
  2. Step 2: Convert to fraction form
    87,078.76/130,676.38 = 31,674.76/x
  3. Step 3: Cross multiply
    87,078.76x = 130,676.38 × 31,674.76
  4. Step 4: Simplify right side
    87,078.76x = 4,139,142,974.17
  5. Step 5: Solve for x
    x = 4,139,142,974.17/87,078.76
  6. Step 6: Final answer
    x = 47,533.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.