Home / 78,212.55-117,289.67-40,756.53

Finding the Fourth Proportional to 78,212.55, 117,289.67 and 40,756.53

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Solution

The fourth proportional to 78,212.55, 117,289.67 and 40,756.53 is: 61,119.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,212.55 : 117,289.67 = 40,756.53 : x
  2. Step 2: Convert to fraction form
    78,212.55/117,289.67 = 40,756.53/x
  3. Step 3: Cross multiply
    78,212.55x = 117,289.67 × 40,756.53
  4. Step 4: Simplify right side
    78,212.55x = 4,780,319,750.26
  5. Step 5: Solve for x
    x = 4,780,319,750.26/78,212.55
  6. Step 6: Final answer
    x = 61,119.60

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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.