Home / 89,771.35-123,890-49,485.02

Finding the Fourth Proportional to 89,771.35, 123,890 and 49,485.02

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Solution

The fourth proportional to 89,771.35, 123,890 and 49,485.02 is: 68,292.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,771.35 : 123,890 = 49,485.02 : x
  2. Step 2: Convert to fraction form
    89,771.35/123,890 = 49,485.02/x
  3. Step 3: Cross multiply
    89,771.35x = 123,890 × 49,485.02
  4. Step 4: Simplify right side
    89,771.35x = 6,130,699,127.80
  5. Step 5: Solve for x
    x = 6,130,699,127.80/89,771.35
  6. Step 6: Final answer
    x = 68,292.38

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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.