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Finding the Fourth Proportional to 90,189.09, 124,461.09 and 49,904.55

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Solution

The fourth proportional to 90,189.09, 124,461.09 and 49,904.55 is: 68,868.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,189.09 : 124,461.09 = 49,904.55 : x
  2. Step 2: Convert to fraction form
    90,189.09/124,461.09 = 49,904.55/x
  3. Step 3: Cross multiply
    90,189.09x = 124,461.09 × 49,904.55
  4. Step 4: Simplify right side
    90,189.09x = 6,211,174,688.96
  5. Step 5: Solve for x
    x = 6,211,174,688.96/90,189.09
  6. Step 6: Final answer
    x = 68,868.36

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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.