Home / 123,542.21-185,518.28-77,090.33

Finding the Fourth Proportional to 123,542.21, 185,518.28 and 77,090.33

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Solution

The fourth proportional to 123,542.21, 185,518.28 and 77,090.33 is: 115,763.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,542.21 : 185,518.28 = 77,090.33 : x
  2. Step 2: Convert to fraction form
    123,542.21/185,518.28 = 77,090.33/x
  3. Step 3: Cross multiply
    123,542.21x = 185,518.28 × 77,090.33
  4. Step 4: Simplify right side
    123,542.21x = 14,301,666,082.75
  5. Step 5: Solve for x
    x = 14,301,666,082.75/123,542.21
  6. Step 6: Final answer
    x = 115,763.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.