Home / 135,630.90-187,133.09-78,266.22

Finding the Fourth Proportional to 135,630.90, 187,133.09 and 78,266.22

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Solution

The fourth proportional to 135,630.90, 187,133.09 and 78,266.22 is: 107,985.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,630.90 : 187,133.09 = 78,266.22 : x
  2. Step 2: Convert to fraction form
    135,630.90/187,133.09 = 78,266.22/x
  3. Step 3: Cross multiply
    135,630.90x = 187,133.09 × 78,266.22
  4. Step 4: Simplify right side
    135,630.90x = 14,646,199,199.89
  5. Step 5: Solve for x
    x = 14,646,199,199.89/135,630.90
  6. Step 6: Final answer
    x = 107,985.71

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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.