Home / 78,384.40-117,576.60-55,114.72

Finding the Fourth Proportional to 78,384.40, 117,576.60 and 55,114.72

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Solution

The fourth proportional to 78,384.40, 117,576.60 and 55,114.72 is: 82,672.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,384.40 : 117,576.60 = 55,114.72 : x
  2. Step 2: Convert to fraction form
    78,384.40/117,576.60 = 55,114.72/x
  3. Step 3: Cross multiply
    78,384.40x = 117,576.60 × 55,114.72
  4. Step 4: Simplify right side
    78,384.40x = 6,480,201,387.55
  5. Step 5: Solve for x
    x = 6,480,201,387.55/78,384.40
  6. Step 6: Final answer
    x = 82,672.08

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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.