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Finding the Fourth Proportional to 145,893.50, 201,333.06 and 78,825.50

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Solution

The fourth proportional to 145,893.50, 201,333.06 and 78,825.50 is: 108,779.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,893.50 : 201,333.06 = 78,825.50 : x
  2. Step 2: Convert to fraction form
    145,893.50/201,333.06 = 78,825.50/x
  3. Step 3: Cross multiply
    145,893.50x = 201,333.06 × 78,825.50
  4. Step 4: Simplify right side
    145,893.50x = 15,870,179,121.03
  5. Step 5: Solve for x
    x = 15,870,179,121.03/145,893.50
  6. Step 6: Final answer
    x = 108,779.21

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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.