Home / 78,984.36-118,477.32-19,820.28

Finding the Fourth Proportional to 78,984.36, 118,477.32 and 19,820.28

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Solution

The fourth proportional to 78,984.36, 118,477.32 and 19,820.28 is: 29,730.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,984.36 : 118,477.32 = 19,820.28 : x
  2. Step 2: Convert to fraction form
    78,984.36/118,477.32 = 19,820.28/x
  3. Step 3: Cross multiply
    78,984.36x = 118,477.32 × 19,820.28
  4. Step 4: Simplify right side
    78,984.36x = 2,348,253,656.05
  5. Step 5: Solve for x
    x = 2,348,253,656.05/78,984.36
  6. Step 6: Final answer
    x = 29,730.62

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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.