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Finding the Fourth Proportional to 139,469.16, 209,203.74 and 56,421.48

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Solution

The fourth proportional to 139,469.16, 209,203.74 and 56,421.48 is: 84,632.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,469.16 : 209,203.74 = 56,421.48 : x
  2. Step 2: Convert to fraction form
    139,469.16/209,203.74 = 56,421.48/x
  3. Step 3: Cross multiply
    139,469.16x = 209,203.74 × 56,421.48
  4. Step 4: Simplify right side
    139,469.16x = 11,803,584,632.34
  5. Step 5: Solve for x
    x = 11,803,584,632.34/139,469.16
  6. Step 6: Final answer
    x = 84,632.22

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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.