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Finding the Fourth Proportional to 201,186.60, 301,779.90 and 76,511.40

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Solution

The fourth proportional to 201,186.60, 301,779.90 and 76,511.40 is: 114,767.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,186.60 : 301,779.90 = 76,511.40 : x
  2. Step 2: Convert to fraction form
    201,186.60/301,779.90 = 76,511.40/x
  3. Step 3: Cross multiply
    201,186.60x = 301,779.90 × 76,511.40
  4. Step 4: Simplify right side
    201,186.60x = 23,089,602,640.86
  5. Step 5: Solve for x
    x = 23,089,602,640.86/201,186.60
  6. Step 6: Final answer
    x = 114,767.10

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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.