Home / 91,285.08-125,904-78,559.44

Finding the Fourth Proportional to 91,285.08, 125,904 and 78,559.44

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Solution

The fourth proportional to 91,285.08, 125,904 and 78,559.44 is: 108,352.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,285.08 : 125,904 = 78,559.44 : x
  2. Step 2: Convert to fraction form
    91,285.08/125,904 = 78,559.44/x
  3. Step 3: Cross multiply
    91,285.08x = 125,904 × 78,559.44
  4. Step 4: Simplify right side
    91,285.08x = 9,890,947,733.76
  5. Step 5: Solve for x
    x = 9,890,947,733.76/91,285.08
  6. Step 6: Final answer
    x = 108,352.29

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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.