Home / 78,838.24-118,272.93-28,918.80

Finding the Fourth Proportional to 78,838.24, 118,272.93 and 28,918.80

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Solution

The fourth proportional to 78,838.24, 118,272.93 and 28,918.80 is: 43,383.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,838.24 : 118,272.93 = 28,918.80 : x
  2. Step 2: Convert to fraction form
    78,838.24/118,272.93 = 28,918.80/x
  3. Step 3: Cross multiply
    78,838.24x = 118,272.93 × 28,918.80
  4. Step 4: Simplify right side
    78,838.24x = 3,420,311,011.00
  5. Step 5: Solve for x
    x = 3,420,311,011.00/78,838.24
  6. Step 6: Final answer
    x = 43,383.91

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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.