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Finding the Fourth Proportional to 78,903.66, 118,356.21 and 28,984.62

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Solution

The fourth proportional to 78,903.66, 118,356.21 and 28,984.62 is: 43,477.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,903.66 : 118,356.21 = 28,984.62 : x
  2. Step 2: Convert to fraction form
    78,903.66/118,356.21 = 28,984.62/x
  3. Step 3: Cross multiply
    78,903.66x = 118,356.21 × 28,984.62
  4. Step 4: Simplify right side
    78,903.66x = 3,430,509,771.49
  5. Step 5: Solve for x
    x = 3,430,509,771.49/78,903.66
  6. Step 6: Final answer
    x = 43,477.19

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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.