Home / 136,980.48-189,036.16-80,432.64

Finding the Fourth Proportional to 136,980.48, 189,036.16 and 80,432.64

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Solution

The fourth proportional to 136,980.48, 189,036.16 and 80,432.64 is: 110,998.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,980.48 : 189,036.16 = 80,432.64 : x
  2. Step 2: Convert to fraction form
    136,980.48/189,036.16 = 80,432.64/x
  3. Step 3: Cross multiply
    136,980.48x = 189,036.16 × 80,432.64
  4. Step 4: Simplify right side
    136,980.48x = 15,204,677,404.26
  5. Step 5: Solve for x
    x = 15,204,677,404.26/136,980.48
  6. Step 6: Final answer
    x = 110,998.86

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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.