Home / 85,985.16-128,825.20-35,955

Finding the Fourth Proportional to 85,985.16, 128,825.20 and 35,955

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Solution

The fourth proportional to 85,985.16, 128,825.20 and 35,955 is: 53,868.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,985.16 : 128,825.20 = 35,955 : x
  2. Step 2: Convert to fraction form
    85,985.16/128,825.20 = 35,955/x
  3. Step 3: Cross multiply
    85,985.16x = 128,825.20 × 35,955
  4. Step 4: Simplify right side
    85,985.16x = 4,631,910,066
  5. Step 5: Solve for x
    x = 4,631,910,066/85,985.16
  6. Step 6: Final answer
    x = 53,868.71

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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.