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Finding the Fourth Proportional to 86,529.90, 129,852.90 and 30,369.90

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Solution

The fourth proportional to 86,529.90, 129,852.90 and 30,369.90 is: 45,575.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,529.90 : 129,852.90 = 30,369.90 : x
  2. Step 2: Convert to fraction form
    86,529.90/129,852.90 = 30,369.90/x
  3. Step 3: Cross multiply
    86,529.90x = 129,852.90 × 30,369.90
  4. Step 4: Simplify right side
    86,529.90x = 3,943,619,587.71
  5. Step 5: Solve for x
    x = 3,943,619,587.71/86,529.90
  6. Step 6: Final answer
    x = 45,575.22

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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.