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Finding the Fourth Proportional to 90,958.09, 125,477.01 and 60,783.88

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Solution

The fourth proportional to 90,958.09, 125,477.01 and 60,783.88 is: 83,851.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,958.09 : 125,477.01 = 60,783.88 : x
  2. Step 2: Convert to fraction form
    90,958.09/125,477.01 = 60,783.88/x
  3. Step 3: Cross multiply
    90,958.09x = 125,477.01 × 60,783.88
  4. Step 4: Simplify right side
    90,958.09x = 7,626,979,518.60
  5. Step 5: Solve for x
    x = 7,626,979,518.60/90,958.09
  6. Step 6: Final answer
    x = 83,851.58

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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.