Home / 86,538.24-129,808.40-30,379.76

Finding the Fourth Proportional to 86,538.24, 129,808.40 and 30,379.76

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Solution

The fourth proportional to 86,538.24, 129,808.40 and 30,379.76 is: 45,570.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,538.24 : 129,808.40 = 30,379.76 : x
  2. Step 2: Convert to fraction form
    86,538.24/129,808.40 = 30,379.76/x
  3. Step 3: Cross multiply
    86,538.24x = 129,808.40 × 30,379.76
  4. Step 4: Simplify right side
    86,538.24x = 3,943,548,037.98
  5. Step 5: Solve for x
    x = 3,943,548,037.98/86,538.24
  6. Step 6: Final answer
    x = 45,570.01

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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.