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Finding the Fourth Proportional to 115,779.81, 159,784.71 and 64,797.64

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Solution

The fourth proportional to 115,779.81, 159,784.71 and 64,797.64 is: 89,425.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,779.81 : 159,784.71 = 64,797.64 : x
  2. Step 2: Convert to fraction form
    115,779.81/159,784.71 = 64,797.64/x
  3. Step 3: Cross multiply
    115,779.81x = 159,784.71 × 64,797.64
  4. Step 4: Simplify right side
    115,779.81x = 10,353,672,116.08
  5. Step 5: Solve for x
    x = 10,353,672,116.08/115,779.81
  6. Step 6: Final answer
    x = 89,425.54

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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.