Home / 86,586.32-129,886.90-30,421.59

Finding the Fourth Proportional to 86,586.32, 129,886.90 and 30,421.59

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Solution

The fourth proportional to 86,586.32, 129,886.90 and 30,421.59 is: 45,634.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,586.32 : 129,886.90 = 30,421.59 : x
  2. Step 2: Convert to fraction form
    86,586.32/129,886.90 = 30,421.59/x
  3. Step 3: Cross multiply
    86,586.32x = 129,886.90 × 30,421.59
  4. Step 4: Simplify right side
    86,586.32x = 3,951,366,018.17
  5. Step 5: Solve for x
    x = 3,951,366,018.17/86,586.32
  6. Step 6: Final answer
    x = 45,634.99

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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.