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Finding the Fourth Proportional to 101,043.70, 139,453.31 and 84,018.67

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Solution

The fourth proportional to 101,043.70, 139,453.31 and 84,018.67 is: 115,956.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,043.70 : 139,453.31 = 84,018.67 : x
  2. Step 2: Convert to fraction form
    101,043.70/139,453.31 = 84,018.67/x
  3. Step 3: Cross multiply
    101,043.70x = 139,453.31 × 84,018.67
  4. Step 4: Simplify right side
    101,043.70x = 11,716,681,494.71
  5. Step 5: Solve for x
    x = 11,716,681,494.71/101,043.70
  6. Step 6: Final answer
    x = 115,956.58

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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.