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Finding the Fourth Proportional to 89,859.70, 134,703.15 and 69,858.10

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Solution

The fourth proportional to 89,859.70, 134,703.15 and 69,858.10 is: 104,719.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,859.70 : 134,703.15 = 69,858.10 : x
  2. Step 2: Convert to fraction form
    89,859.70/134,703.15 = 69,858.10/x
  3. Step 3: Cross multiply
    89,859.70x = 134,703.15 × 69,858.10
  4. Step 4: Simplify right side
    89,859.70x = 9,410,106,123.02
  5. Step 5: Solve for x
    x = 9,410,106,123.02/89,859.70
  6. Step 6: Final answer
    x = 104,719.98

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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.