Home / 145,978.45-201,450.32-78,910.45

Finding the Fourth Proportional to 145,978.45, 201,450.32 and 78,910.45

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Solution

The fourth proportional to 145,978.45, 201,450.32 and 78,910.45 is: 108,896.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,978.45 : 201,450.32 = 78,910.45 : x
  2. Step 2: Convert to fraction form
    145,978.45/201,450.32 = 78,910.45/x
  3. Step 3: Cross multiply
    145,978.45x = 201,450.32 × 78,910.45
  4. Step 4: Simplify right side
    145,978.45x = 15,896,535,403.84
  5. Step 5: Solve for x
    x = 15,896,535,403.84/145,978.45
  6. Step 6: Final answer
    x = 108,896.45

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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.