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Finding the Fourth Proportional to 145,978.33, 201,450.14 and 78,910.33

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Solution

The fourth proportional to 145,978.33, 201,450.14 and 78,910.33 is: 108,896.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,978.33 : 201,450.14 = 78,910.33 : x
  2. Step 2: Convert to fraction form
    145,978.33/201,450.14 = 78,910.33/x
  3. Step 3: Cross multiply
    145,978.33x = 201,450.14 × 78,910.33
  4. Step 4: Simplify right side
    145,978.33x = 15,896,497,025.95
  5. Step 5: Solve for x
    x = 15,896,497,025.95/145,978.33
  6. Step 6: Final answer
    x = 108,896.28

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1.5x scale

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.