Home / 85,280.07-117,718.92-64,120.80

Finding the Fourth Proportional to 85,280.07, 117,718.92 and 64,120.80

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Solution

The fourth proportional to 85,280.07, 117,718.92 and 64,120.80 is: 88,511.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,280.07 : 117,718.92 = 64,120.80 : x
  2. Step 2: Convert to fraction form
    85,280.07/117,718.92 = 64,120.80/x
  3. Step 3: Cross multiply
    85,280.07x = 117,718.92 × 64,120.80
  4. Step 4: Simplify right side
    85,280.07x = 7,548,231,325.54
  5. Step 5: Solve for x
    x = 7,548,231,325.54/85,280.07
  6. Step 6: Final answer
    x = 88,511.08

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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.