Home / 139,618.40-209,427.60-86,474.30

Finding the Fourth Proportional to 139,618.40, 209,427.60 and 86,474.30

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Solution

The fourth proportional to 139,618.40, 209,427.60 and 86,474.30 is: 129,711.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,618.40 : 209,427.60 = 86,474.30 : x
  2. Step 2: Convert to fraction form
    139,618.40/209,427.60 = 86,474.30/x
  3. Step 3: Cross multiply
    139,618.40x = 209,427.60 × 86,474.30
  4. Step 4: Simplify right side
    139,618.40x = 18,110,105,110.68
  5. Step 5: Solve for x
    x = 18,110,105,110.68/139,618.40
  6. Step 6: Final answer
    x = 129,711.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.