Home / 85,128.51-127,711.54-25,968.74

Finding the Fourth Proportional to 85,128.51, 127,711.54 and 25,968.74

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Solution

The fourth proportional to 85,128.51, 127,711.54 and 25,968.74 is: 38,958.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,128.51 : 127,711.54 = 25,968.74 : x
  2. Step 2: Convert to fraction form
    85,128.51/127,711.54 = 25,968.74/x
  3. Step 3: Cross multiply
    85,128.51x = 127,711.54 × 25,968.74
  4. Step 4: Simplify right side
    85,128.51x = 3,316,507,777.26
  5. Step 5: Solve for x
    x = 3,316,507,777.26/85,128.51
  6. Step 6: Final answer
    x = 38,958.84

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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.