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Finding the Fourth Proportional to 86,682.80, 129,829.80 and 71,130.80

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Solution

The fourth proportional to 86,682.80, 129,829.80 and 71,130.80 is: 106,536.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,682.80 : 129,829.80 = 71,130.80 : x
  2. Step 2: Convert to fraction form
    86,682.80/129,829.80 = 71,130.80/x
  3. Step 3: Cross multiply
    86,682.80x = 129,829.80 × 71,130.80
  4. Step 4: Simplify right side
    86,682.80x = 9,234,897,537.84
  5. Step 5: Solve for x
    x = 9,234,897,537.84/86,682.80
  6. Step 6: Final answer
    x = 106,536.68

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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.