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Finding the Fourth Proportional to 85,953.77, 129,076.05 and 56,018.87

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Solution

The fourth proportional to 85,953.77, 129,076.05 and 56,018.87 is: 84,123.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,953.77 : 129,076.05 = 56,018.87 : x
  2. Step 2: Convert to fraction form
    85,953.77/129,076.05 = 56,018.87/x
  3. Step 3: Cross multiply
    85,953.77x = 129,076.05 × 56,018.87
  4. Step 4: Simplify right side
    85,953.77x = 7,230,693,819.68
  5. Step 5: Solve for x
    x = 7,230,693,819.68/85,953.77
  6. Step 6: Final answer
    x = 84,123.06

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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.