Home / 73,970.23-102,078.93-39,978.60

Finding the Fourth Proportional to 73,970.23, 102,078.93 and 39,978.60

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Solution

The fourth proportional to 73,970.23, 102,078.93 and 39,978.60 is: 55,170.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,970.23 : 102,078.93 = 39,978.60 : x
  2. Step 2: Convert to fraction form
    73,970.23/102,078.93 = 39,978.60/x
  3. Step 3: Cross multiply
    73,970.23x = 102,078.93 × 39,978.60
  4. Step 4: Simplify right side
    73,970.23x = 4,080,972,710.90
  5. Step 5: Solve for x
    x = 4,080,972,710.90/73,970.23
  6. Step 6: Final answer
    x = 55,170.47

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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.