Home / 86,379.86-129,569.81-56,929.19

Finding the Fourth Proportional to 86,379.86, 129,569.81 and 56,929.19

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Solution

The fourth proportional to 86,379.86, 129,569.81 and 56,929.19 is: 85,393.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,379.86 : 129,569.81 = 56,929.19 : x
  2. Step 2: Convert to fraction form
    86,379.86/129,569.81 = 56,929.19/x
  3. Step 3: Cross multiply
    86,379.86x = 129,569.81 × 56,929.19
  4. Step 4: Simplify right side
    86,379.86x = 7,376,303,399.26
  5. Step 5: Solve for x
    x = 7,376,303,399.26/86,379.86
  6. Step 6: Final answer
    x = 85,393.78

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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.