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Finding the Fourth Proportional to 82,886.70, 124,330.05 and 69,764.70

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Solution

The fourth proportional to 82,886.70, 124,330.05 and 69,764.70 is: 104,647.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,886.70 : 124,330.05 = 69,764.70 : x
  2. Step 2: Convert to fraction form
    82,886.70/124,330.05 = 69,764.70/x
  3. Step 3: Cross multiply
    82,886.70x = 124,330.05 × 69,764.70
  4. Step 4: Simplify right side
    82,886.70x = 8,673,848,639.24
  5. Step 5: Solve for x
    x = 8,673,848,639.24/82,886.70
  6. Step 6: Final answer
    x = 104,647.05

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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.