Home / 85,689.06-118,214.25-51,678.21

Finding the Fourth Proportional to 85,689.06, 118,214.25 and 51,678.21

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Solution

The fourth proportional to 85,689.06, 118,214.25 and 51,678.21 is: 71,293.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,689.06 : 118,214.25 = 51,678.21 : x
  2. Step 2: Convert to fraction form
    85,689.06/118,214.25 = 51,678.21/x
  3. Step 3: Cross multiply
    85,689.06x = 118,214.25 × 51,678.21
  4. Step 4: Simplify right side
    85,689.06x = 6,109,100,836.49
  5. Step 5: Solve for x
    x = 6,109,100,836.49/85,689.06
  6. Step 6: Final answer
    x = 71,293.82

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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.