Home / 78,147.48-117,283.20-40,718.19

Finding the Fourth Proportional to 78,147.48, 117,283.20 and 40,718.19

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Solution

The fourth proportional to 78,147.48, 117,283.20 and 40,718.19 is: 61,109.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,147.48 : 117,283.20 = 40,718.19 : x
  2. Step 2: Convert to fraction form
    78,147.48/117,283.20 = 40,718.19/x
  3. Step 3: Cross multiply
    78,147.48x = 117,283.20 × 40,718.19
  4. Step 4: Simplify right side
    78,147.48x = 4,775,559,621.41
  5. Step 5: Solve for x
    x = 4,775,559,621.41/78,147.48
  6. Step 6: Final answer
    x = 61,109.58

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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.