Home / 86,835.72-129,473.24-79,421.68

Finding the Fourth Proportional to 86,835.72, 129,473.24 and 79,421.68

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Solution

The fourth proportional to 86,835.72, 129,473.24 and 79,421.68 is: 118,418.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,835.72 : 129,473.24 = 79,421.68 : x
  2. Step 2: Convert to fraction form
    86,835.72/129,473.24 = 79,421.68/x
  3. Step 3: Cross multiply
    86,835.72x = 129,473.24 × 79,421.68
  4. Step 4: Simplify right side
    86,835.72x = 10,282,982,235.84
  5. Step 5: Solve for x
    x = 10,282,982,235.84/86,835.72
  6. Step 6: Final answer
    x = 118,418.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.