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Finding the Fourth Proportional to 70,779.20, 106,015.20 and 58,491.20

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Solution

The fourth proportional to 70,779.20, 106,015.20 and 58,491.20 is: 87,609.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,779.20 : 106,015.20 = 58,491.20 : x
  2. Step 2: Convert to fraction form
    70,779.20/106,015.20 = 58,491.20/x
  3. Step 3: Cross multiply
    70,779.20x = 106,015.20 × 58,491.20
  4. Step 4: Simplify right side
    70,779.20x = 6,200,956,266.24
  5. Step 5: Solve for x
    x = 6,200,956,266.24/70,779.20
  6. Step 6: Final answer
    x = 87,609.87

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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.