Home / 85,917.50-128,703.80-43,795.88

Finding the Fourth Proportional to 85,917.50, 128,703.80 and 43,795.88

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Solution

The fourth proportional to 85,917.50, 128,703.80 and 43,795.88 is: 65,605.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,917.50 : 128,703.80 = 43,795.88 : x
  2. Step 2: Convert to fraction form
    85,917.50/128,703.80 = 43,795.88/x
  3. Step 3: Cross multiply
    85,917.50x = 128,703.80 × 43,795.88
  4. Step 4: Simplify right side
    85,917.50x = 5,636,696,283.12
  5. Step 5: Solve for x
    x = 5,636,696,283.12/85,917.50
  6. Step 6: Final answer
    x = 65,605.91

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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.