Home / 86,426.79-129,659.21-26,455.74

Finding the Fourth Proportional to 86,426.79, 129,659.21 and 26,455.74

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Solution

The fourth proportional to 86,426.79, 129,659.21 and 26,455.74 is: 39,689.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,426.79 : 129,659.21 = 26,455.74 : x
  2. Step 2: Convert to fraction form
    86,426.79/129,659.21 = 26,455.74/x
  3. Step 3: Cross multiply
    86,426.79x = 129,659.21 × 26,455.74
  4. Step 4: Simplify right side
    86,426.79x = 3,430,230,348.37
  5. Step 5: Solve for x
    x = 3,430,230,348.37/86,426.79
  6. Step 6: Final answer
    x = 39,689.43

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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.