Home / 78,571.07-117,785.08-28,639.77

Finding the Fourth Proportional to 78,571.07, 117,785.08 and 28,639.77

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Solution

The fourth proportional to 78,571.07, 117,785.08 and 28,639.77 is: 42,933.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,571.07 : 117,785.08 = 28,639.77 : x
  2. Step 2: Convert to fraction form
    78,571.07/117,785.08 = 28,639.77/x
  3. Step 3: Cross multiply
    78,571.07x = 117,785.08 × 28,639.77
  4. Step 4: Simplify right side
    78,571.07x = 3,373,337,600.63
  5. Step 5: Solve for x
    x = 3,373,337,600.63/78,571.07
  6. Step 6: Final answer
    x = 42,933.58

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1.5x scale

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.