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Finding the Fourth Proportional to 86,580.56, 129,776.28 and 55,004.74

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Solution

The fourth proportional to 86,580.56, 129,776.28 and 55,004.74 is: 82,447.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,580.56 : 129,776.28 = 55,004.74 : x
  2. Step 2: Convert to fraction form
    86,580.56/129,776.28 = 55,004.74/x
  3. Step 3: Cross multiply
    86,580.56x = 129,776.28 × 55,004.74
  4. Step 4: Simplify right side
    86,580.56x = 7,138,310,008.86
  5. Step 5: Solve for x
    x = 7,138,310,008.86/86,580.56
  6. Step 6: Final answer
    x = 82,447.03

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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.