Home / 78,648.12-118,003.35-28,731.45

Finding the Fourth Proportional to 78,648.12, 118,003.35 and 28,731.45

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Solution

The fourth proportional to 78,648.12, 118,003.35 and 28,731.45 is: 43,108.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,648.12 : 118,003.35 = 28,731.45 : x
  2. Step 2: Convert to fraction form
    78,648.12/118,003.35 = 28,731.45/x
  3. Step 3: Cross multiply
    78,648.12x = 118,003.35 × 28,731.45
  4. Step 4: Simplify right side
    78,648.12x = 3,390,407,350.36
  5. Step 5: Solve for x
    x = 3,390,407,350.36/78,648.12
  6. Step 6: Final answer
    x = 43,108.56

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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.