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Finding the Fourth Proportional to 78,395.73, 108,185.09 and 42,586.89

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Solution

The fourth proportional to 78,395.73, 108,185.09 and 42,586.89 is: 58,769.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,395.73 : 108,185.09 = 42,586.89 : x
  2. Step 2: Convert to fraction form
    78,395.73/108,185.09 = 42,586.89/x
  3. Step 3: Cross multiply
    78,395.73x = 108,185.09 × 42,586.89
  4. Step 4: Simplify right side
    78,395.73x = 4,607,266,314.54
  5. Step 5: Solve for x
    x = 4,607,266,314.54/78,395.73
  6. Step 6: Final answer
    x = 58,769.35

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1.5x scale

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.