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Finding the Fourth Proportional to 78,980.34, 118,313.80 and 36,802.34

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Solution

The fourth proportional to 78,980.34, 118,313.80 and 36,802.34 is: 55,130.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,980.34 : 118,313.80 = 36,802.34 : x
  2. Step 2: Convert to fraction form
    78,980.34/118,313.80 = 36,802.34/x
  3. Step 3: Cross multiply
    78,980.34x = 118,313.80 × 36,802.34
  4. Step 4: Simplify right side
    78,980.34x = 4,354,224,584.74
  5. Step 5: Solve for x
    x = 4,354,224,584.74/78,980.34
  6. Step 6: Final answer
    x = 55,130.48

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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.