Home / 81,556.02-112,490.39-78,812.75

Finding the Fourth Proportional to 81,556.02, 112,490.39 and 78,812.75

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Solution

The fourth proportional to 81,556.02, 112,490.39 and 78,812.75 is: 108,706.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,556.02 : 112,490.39 = 78,812.75 : x
  2. Step 2: Convert to fraction form
    81,556.02/112,490.39 = 78,812.75/x
  3. Step 3: Cross multiply
    81,556.02x = 112,490.39 × 78,812.75
  4. Step 4: Simplify right side
    81,556.02x = 8,865,677,462.73
  5. Step 5: Solve for x
    x = 8,865,677,462.73/81,556.02
  6. Step 6: Final answer
    x = 108,706.60

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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.