Home / 139,946.80-209,774.40-76,669.60

Finding the Fourth Proportional to 139,946.80, 209,774.40 and 76,669.60

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Solution

The fourth proportional to 139,946.80, 209,774.40 and 76,669.60 is: 114,924.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,946.80 : 209,774.40 = 76,669.60 : x
  2. Step 2: Convert to fraction form
    139,946.80/209,774.40 = 76,669.60/x
  3. Step 3: Cross multiply
    139,946.80x = 209,774.40 × 76,669.60
  4. Step 4: Simplify right side
    139,946.80x = 16,083,319,338.24
  5. Step 5: Solve for x
    x = 16,083,319,338.24/139,946.80
  6. Step 6: Final answer
    x = 114,924.52

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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.