Home / 136,858.78-188,842.08-76,427.20

Finding the Fourth Proportional to 136,858.78, 188,842.08 and 76,427.20

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Solution

The fourth proportional to 136,858.78, 188,842.08 and 76,427.20 is: 105,456.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,858.78 : 188,842.08 = 76,427.20 : x
  2. Step 2: Convert to fraction form
    136,858.78/188,842.08 = 76,427.20/x
  3. Step 3: Cross multiply
    136,858.78x = 188,842.08 × 76,427.20
  4. Step 4: Simplify right side
    136,858.78x = 14,432,671,416.58
  5. Step 5: Solve for x
    x = 14,432,671,416.58/136,858.78
  6. Step 6: Final answer
    x = 105,456.67

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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.