Home / 85,914.96-118,629-55,721.40

Finding the Fourth Proportional to 85,914.96, 118,629 and 55,721.40

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Solution

The fourth proportional to 85,914.96, 118,629 and 55,721.40 is: 76,938.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,914.96 : 118,629 = 55,721.40 : x
  2. Step 2: Convert to fraction form
    85,914.96/118,629 = 55,721.40/x
  3. Step 3: Cross multiply
    85,914.96x = 118,629 × 55,721.40
  4. Step 4: Simplify right side
    85,914.96x = 6,610,173,960.60
  5. Step 5: Solve for x
    x = 6,610,173,960.60/85,914.96
  6. Step 6: Final answer
    x = 76,938.57

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1.5x scale

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.