Home / 135,622.16-187,155.68-78,256.98

Finding the Fourth Proportional to 135,622.16, 187,155.68 and 78,256.98

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Solution

The fourth proportional to 135,622.16, 187,155.68 and 78,256.98 is: 107,992.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,622.16 : 187,155.68 = 78,256.98 : x
  2. Step 2: Convert to fraction form
    135,622.16/187,155.68 = 78,256.98/x
  3. Step 3: Cross multiply
    135,622.16x = 187,155.68 × 78,256.98
  4. Step 4: Simplify right side
    135,622.16x = 14,646,237,915.36
  5. Step 5: Solve for x
    x = 14,646,237,915.36/135,622.16
  6. Step 6: Final answer
    x = 107,992.96

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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.