Home / 86,429.72-129,643.30-52,705.65

Finding the Fourth Proportional to 86,429.72, 129,643.30 and 52,705.65

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Solution

The fourth proportional to 86,429.72, 129,643.30 and 52,705.65 is: 79,057.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,429.72 : 129,643.30 = 52,705.65 : x
  2. Step 2: Convert to fraction form
    86,429.72/129,643.30 = 52,705.65/x
  3. Step 3: Cross multiply
    86,429.72x = 129,643.30 × 52,705.65
  4. Step 4: Simplify right side
    86,429.72x = 6,832,934,262.88
  5. Step 5: Solve for x
    x = 6,832,934,262.88/86,429.72
  6. Step 6: Final answer
    x = 79,057.69

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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.