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Finding the Fourth Proportional to 86,225.80, 129,486.30 and 46,859.80

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Solution

The fourth proportional to 86,225.80, 129,486.30 and 46,859.80 is: 70,369.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,225.80 : 129,486.30 = 46,859.80 : x
  2. Step 2: Convert to fraction form
    86,225.80/129,486.30 = 46,859.80/x
  3. Step 3: Cross multiply
    86,225.80x = 129,486.30 × 46,859.80
  4. Step 4: Simplify right side
    86,225.80x = 6,067,702,120.74
  5. Step 5: Solve for x
    x = 6,067,702,120.74/86,225.80
  6. Step 6: Final answer
    x = 70,369.91

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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.