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Finding the Fourth Proportional to 90,777.39, 125,242.04 and 64,914.09

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Solution

The fourth proportional to 90,777.39, 125,242.04 and 64,914.09 is: 89,559.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,777.39 : 125,242.04 = 64,914.09 : x
  2. Step 2: Convert to fraction form
    90,777.39/125,242.04 = 64,914.09/x
  3. Step 3: Cross multiply
    90,777.39x = 125,242.04 × 64,914.09
  4. Step 4: Simplify right side
    90,777.39x = 8,129,973,218.63
  5. Step 5: Solve for x
    x = 8,129,973,218.63/90,777.39
  6. Step 6: Final answer
    x = 89,559.45

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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.