Home / 85,128.64-117,438.01-54,923.66

Finding the Fourth Proportional to 85,128.64, 117,438.01 and 54,923.66

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Solution

The fourth proportional to 85,128.64, 117,438.01 and 54,923.66 is: 75,769.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,128.64 : 117,438.01 = 54,923.66 : x
  2. Step 2: Convert to fraction form
    85,128.64/117,438.01 = 54,923.66/x
  3. Step 3: Cross multiply
    85,128.64x = 117,438.01 × 54,923.66
  4. Step 4: Simplify right side
    85,128.64x = 6,450,125,332.32
  5. Step 5: Solve for x
    x = 6,450,125,332.32/85,128.64
  6. Step 6: Final answer
    x = 75,769.16

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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.