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Finding the Fourth Proportional to 90,783.88, 125,281.75 and 51,039.88

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Solution

The fourth proportional to 90,783.88, 125,281.75 and 51,039.88 is: 70,435.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,783.88 : 125,281.75 = 51,039.88 : x
  2. Step 2: Convert to fraction form
    90,783.88/125,281.75 = 51,039.88/x
  3. Step 3: Cross multiply
    90,783.88x = 125,281.75 × 51,039.88
  4. Step 4: Simplify right side
    90,783.88x = 6,394,365,486.19
  5. Step 5: Solve for x
    x = 6,394,365,486.19/90,783.88
  6. Step 6: Final answer
    x = 70,435.03

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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.