Home / 135,507.52-187,011.75-78,157.09

Finding the Fourth Proportional to 135,507.52, 187,011.75 and 78,157.09

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Solution

The fourth proportional to 135,507.52, 187,011.75 and 78,157.09 is: 107,863.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,507.52 : 187,011.75 = 78,157.09 : x
  2. Step 2: Convert to fraction form
    135,507.52/187,011.75 = 78,157.09/x
  3. Step 3: Cross multiply
    135,507.52x = 187,011.75 × 78,157.09
  4. Step 4: Simplify right side
    135,507.52x = 14,616,294,175.81
  5. Step 5: Solve for x
    x = 14,616,294,175.81/135,507.52
  6. Step 6: Final answer
    x = 107,863.34

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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.