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Finding the Fourth Proportional to 115,288.40, 172,836.60 and 48,779.60

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Solution

The fourth proportional to 115,288.40, 172,836.60 and 48,779.60 is: 73,128.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,288.40 : 172,836.60 = 48,779.60 : x
  2. Step 2: Convert to fraction form
    115,288.40/172,836.60 = 48,779.60/x
  3. Step 3: Cross multiply
    115,288.40x = 172,836.60 × 48,779.60
  4. Step 4: Simplify right side
    115,288.40x = 8,430,900,213.36
  5. Step 5: Solve for x
    x = 8,430,900,213.36/115,288.40
  6. Step 6: Final answer
    x = 73,128.78

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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.