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Finding the Fourth Proportional to 86,530.56, 130,003.20 and 55,426.56

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Solution

The fourth proportional to 86,530.56, 130,003.20 and 55,426.56 is: 83,272.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,530.56 : 130,003.20 = 55,426.56 : x
  2. Step 2: Convert to fraction form
    86,530.56/130,003.20 = 55,426.56/x
  3. Step 3: Cross multiply
    86,530.56x = 130,003.20 × 55,426.56
  4. Step 4: Simplify right side
    86,530.56x = 7,205,630,164.99
  5. Step 5: Solve for x
    x = 7,205,630,164.99/86,530.56
  6. Step 6: Final answer
    x = 83,272.66

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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.