Home / 208,217.77-312,455.14-81,835.81

Finding the Fourth Proportional to 208,217.77, 312,455.14 and 81,835.81

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Solution

The fourth proportional to 208,217.77, 312,455.14 and 81,835.81 is: 122,804.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,217.77 : 312,455.14 = 81,835.81 : x
  2. Step 2: Convert to fraction form
    208,217.77/312,455.14 = 81,835.81/x
  3. Step 3: Cross multiply
    208,217.77x = 312,455.14 × 81,835.81
  4. Step 4: Simplify right side
    208,217.77x = 25,570,018,484.84
  5. Step 5: Solve for x
    x = 25,570,018,484.84/208,217.77
  6. Step 6: Final answer
    x = 122,804.21

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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.