Home / 78,083.56-117,130.47-31,330.36

Finding the Fourth Proportional to 78,083.56, 117,130.47 and 31,330.36

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Solution

The fourth proportional to 78,083.56, 117,130.47 and 31,330.36 is: 46,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,083.56 : 117,130.47 = 31,330.36 : x
  2. Step 2: Convert to fraction form
    78,083.56/117,130.47 = 31,330.36/x
  3. Step 3: Cross multiply
    78,083.56x = 117,130.47 × 31,330.36
  4. Step 4: Simplify right side
    78,083.56x = 3,669,739,792.07
  5. Step 5: Solve for x
    x = 3,669,739,792.07/78,083.56
  6. Step 6: Final answer
    x = 46,997.60

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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.