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Finding the Fourth Proportional to 118,779.11, 163,915.21 and 65,065.01

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Solution

The fourth proportional to 118,779.11, 163,915.21 and 65,065.01 is: 89,789.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,779.11 : 163,915.21 = 65,065.01 : x
  2. Step 2: Convert to fraction form
    118,779.11/163,915.21 = 65,065.01/x
  3. Step 3: Cross multiply
    118,779.11x = 163,915.21 × 65,065.01
  4. Step 4: Simplify right side
    118,779.11x = 10,665,144,039.56
  5. Step 5: Solve for x
    x = 10,665,144,039.56/118,779.11
  6. Step 6: Final answer
    x = 89,789.73

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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.