Home / 135,915.07-187,551.81-78,558.10

Finding the Fourth Proportional to 135,915.07, 187,551.81 and 78,558.10

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Solution

The fourth proportional to 135,915.07, 187,551.81 and 78,558.10 is: 108,403.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,915.07 : 187,551.81 = 78,558.10 : x
  2. Step 2: Convert to fraction form
    135,915.07/187,551.81 = 78,558.10/x
  3. Step 3: Cross multiply
    135,915.07x = 187,551.81 × 78,558.10
  4. Step 4: Simplify right side
    135,915.07x = 14,733,713,376.28
  5. Step 5: Solve for x
    x = 14,733,713,376.28/135,915.07
  6. Step 6: Final answer
    x = 108,403.83

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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.