Home / 86,708.40-129,735.56-51,189.04

Finding the Fourth Proportional to 86,708.40, 129,735.56 and 51,189.04

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Solution

The fourth proportional to 86,708.40, 129,735.56 and 51,189.04 is: 76,590.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,708.40 : 129,735.56 = 51,189.04 : x
  2. Step 2: Convert to fraction form
    86,708.40/129,735.56 = 51,189.04/x
  3. Step 3: Cross multiply
    86,708.40x = 129,735.56 × 51,189.04
  4. Step 4: Simplify right side
    86,708.40x = 6,641,038,770.26
  5. Step 5: Solve for x
    x = 6,641,038,770.26/86,708.40
  6. Step 6: Final answer
    x = 76,590.49

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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.