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Finding the Fourth Proportional to 72,771.59, 100,438.59 and 45,560.33

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Solution

The fourth proportional to 72,771.59, 100,438.59 and 45,560.33 is: 62,881.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,771.59 : 100,438.59 = 45,560.33 : x
  2. Step 2: Convert to fraction form
    72,771.59/100,438.59 = 45,560.33/x
  3. Step 3: Cross multiply
    72,771.59x = 100,438.59 × 45,560.33
  4. Step 4: Simplify right side
    72,771.59x = 4,576,015,305.13
  5. Step 5: Solve for x
    x = 4,576,015,305.13/72,771.59
  6. Step 6: Final answer
    x = 62,881.89

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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.