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Finding the Fourth Proportional to 86,681.15, 130,021.73 and 80,849.15

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Solution

The fourth proportional to 86,681.15, 130,021.73 and 80,849.15 is: 121,273.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,681.15 : 130,021.73 = 80,849.15 : x
  2. Step 2: Convert to fraction form
    86,681.15/130,021.73 = 80,849.15/x
  3. Step 3: Cross multiply
    86,681.15x = 130,021.73 × 80,849.15
  4. Step 4: Simplify right side
    86,681.15x = 10,512,145,947.78
  5. Step 5: Solve for x
    x = 10,512,145,947.78/86,681.15
  6. Step 6: Final answer
    x = 121,273.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.