Home / 81,430.50-112,380.60-47,902.98

Finding the Fourth Proportional to 81,430.50, 112,380.60 and 47,902.98

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Solution

The fourth proportional to 81,430.50, 112,380.60 and 47,902.98 is: 66,109.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430.50 : 112,380.60 = 47,902.98 : x
  2. Step 2: Convert to fraction form
    81,430.50/112,380.60 = 47,902.98/x
  3. Step 3: Cross multiply
    81,430.50x = 112,380.60 × 47,902.98
  4. Step 4: Simplify right side
    81,430.50x = 5,383,365,634.19
  5. Step 5: Solve for x
    x = 5,383,365,634.19/81,430.50
  6. Step 6: Final answer
    x = 66,109.94

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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.