Home / 136,862.78-188,847.60-76,431.20

Finding the Fourth Proportional to 136,862.78, 188,847.60 and 76,431.20

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Solution

The fourth proportional to 136,862.78, 188,847.60 and 76,431.20 is: 105,462.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,862.78 : 188,847.60 = 76,431.20 : x
  2. Step 2: Convert to fraction form
    136,862.78/188,847.60 = 76,431.20/x
  3. Step 3: Cross multiply
    136,862.78x = 188,847.60 × 76,431.20
  4. Step 4: Simplify right side
    136,862.78x = 14,433,848,685.12
  5. Step 5: Solve for x
    x = 14,433,848,685.12/136,862.78
  6. Step 6: Final answer
    x = 105,462.19

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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.