Home / 139,680.34-209,521.44-39,840.28

Finding the Fourth Proportional to 139,680.34, 209,521.44 and 39,840.28

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Solution

The fourth proportional to 139,680.34, 209,521.44 and 39,840.28 is: 59,760.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,680.34 : 209,521.44 = 39,840.28 : x
  2. Step 2: Convert to fraction form
    139,680.34/209,521.44 = 39,840.28/x
  3. Step 3: Cross multiply
    139,680.34x = 209,521.44 × 39,840.28
  4. Step 4: Simplify right side
    139,680.34x = 8,347,392,835.60
  5. Step 5: Solve for x
    x = 8,347,392,835.60/139,680.34
  6. Step 6: Final answer
    x = 59,760.69

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1.5x scale

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.