Home / 135,501.82-186,987.54-78,143.56

Finding the Fourth Proportional to 135,501.82, 186,987.54 and 78,143.56

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Solution

The fourth proportional to 135,501.82, 186,987.54 and 78,143.56 is: 107,835.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,501.82 : 186,987.54 = 78,143.56 : x
  2. Step 2: Convert to fraction form
    135,501.82/186,987.54 = 78,143.56/x
  3. Step 3: Cross multiply
    135,501.82x = 186,987.54 × 78,143.56
  4. Step 4: Simplify right side
    135,501.82x = 14,611,871,116.30
  5. Step 5: Solve for x
    x = 14,611,871,116.30/135,501.82
  6. Step 6: Final answer
    x = 107,835.24

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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.