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Finding the Fourth Proportional to 85,699.65, 128,569.97 and 35,751.98

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Solution

The fourth proportional to 85,699.65, 128,569.97 and 35,751.98 is: 53,636.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,699.65 : 128,569.97 = 35,751.98 : x
  2. Step 2: Convert to fraction form
    85,699.65/128,569.97 = 35,751.98/x
  3. Step 3: Cross multiply
    85,699.65x = 128,569.97 × 35,751.98
  4. Step 4: Simplify right side
    85,699.65x = 4,596,631,356.57
  5. Step 5: Solve for x
    x = 4,596,631,356.57/85,699.65
  6. Step 6: Final answer
    x = 53,636.53

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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.