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Finding the Fourth Proportional to 85,776.77, 118,406.68 and 55,588.01

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Solution

The fourth proportional to 85,776.77, 118,406.68 and 55,588.01 is: 76,733.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,776.77 : 118,406.68 = 55,588.01 : x
  2. Step 2: Convert to fraction form
    85,776.77/118,406.68 = 55,588.01/x
  3. Step 3: Cross multiply
    85,776.77x = 118,406.68 × 55,588.01
  4. Step 4: Simplify right side
    85,776.77x = 6,581,990,980.90
  5. Step 5: Solve for x
    x = 6,581,990,980.90/85,776.77
  6. Step 6: Final answer
    x = 76,733.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.