Home / 78,830.12-108,803.76-51,977.36

Finding the Fourth Proportional to 78,830.12, 108,803.76 and 51,977.36

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Solution

The fourth proportional to 78,830.12, 108,803.76 and 51,977.36 is: 71,740.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,830.12 : 108,803.76 = 51,977.36 : x
  2. Step 2: Convert to fraction form
    78,830.12/108,803.76 = 51,977.36/x
  3. Step 3: Cross multiply
    78,830.12x = 108,803.76 × 51,977.36
  4. Step 4: Simplify right side
    78,830.12x = 5,655,332,202.87
  5. Step 5: Solve for x
    x = 5,655,332,202.87/78,830.12
  6. Step 6: Final answer
    x = 71,740.75

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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.