Home / 78,442.40-108,195.76-51,576.32

Finding the Fourth Proportional to 78,442.40, 108,195.76 and 51,576.32

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Solution

The fourth proportional to 78,442.40, 108,195.76 and 51,576.32 is: 71,139.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,442.40 : 108,195.76 = 51,576.32 : x
  2. Step 2: Convert to fraction form
    78,442.40/108,195.76 = 51,576.32/x
  3. Step 3: Cross multiply
    78,442.40x = 108,195.76 × 51,576.32
  4. Step 4: Simplify right side
    78,442.40x = 5,580,339,140.40
  5. Step 5: Solve for x
    x = 5,580,339,140.40/78,442.40
  6. Step 6: Final answer
    x = 71,139.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.