Home / 123,428.03-170,213.67-85,126.37

Finding the Fourth Proportional to 123,428.03, 170,213.67 and 85,126.37

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Solution

The fourth proportional to 123,428.03, 170,213.67 and 85,126.37 is: 117,393.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,428.03 : 170,213.67 = 85,126.37 : x
  2. Step 2: Convert to fraction form
    123,428.03/170,213.67 = 85,126.37/x
  3. Step 3: Cross multiply
    123,428.03x = 170,213.67 × 85,126.37
  4. Step 4: Simplify right side
    123,428.03x = 14,489,671,851.48
  5. Step 5: Solve for x
    x = 14,489,671,851.48/123,428.03
  6. Step 6: Final answer
    x = 117,393.69

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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.