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Finding the Fourth Proportional to 86,449.59, 129,674.52 and 56,998.98

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Solution

The fourth proportional to 86,449.59, 129,674.52 and 56,998.98 is: 85,498.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,449.59 : 129,674.52 = 56,998.98 : x
  2. Step 2: Convert to fraction form
    86,449.59/129,674.52 = 56,998.98/x
  3. Step 3: Cross multiply
    86,449.59x = 129,674.52 × 56,998.98
  4. Step 4: Simplify right side
    86,449.59x = 7,391,315,371.99
  5. Step 5: Solve for x
    x = 7,391,315,371.99/86,449.59
  6. Step 6: Final answer
    x = 85,498.56

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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.