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Finding the Fourth Proportional to 84,758.63, 116,983.05 and 56,078.87

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Solution

The fourth proportional to 84,758.63, 116,983.05 and 56,078.87 is: 77,399.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,758.63 : 116,983.05 = 56,078.87 : x
  2. Step 2: Convert to fraction form
    84,758.63/116,983.05 = 56,078.87/x
  3. Step 3: Cross multiply
    84,758.63x = 116,983.05 × 56,078.87
  4. Step 4: Simplify right side
    84,758.63x = 6,560,277,253.15
  5. Step 5: Solve for x
    x = 6,560,277,253.15/84,758.63
  6. Step 6: Final answer
    x = 77,399.52

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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.