Home / 85,688.97-118,214.13-51,678.12

Finding the Fourth Proportional to 85,688.97, 118,214.13 and 51,678.12

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Solution

The fourth proportional to 85,688.97, 118,214.13 and 51,678.12 is: 71,293.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,688.97 : 118,214.13 = 51,678.12 : x
  2. Step 2: Convert to fraction form
    85,688.97/118,214.13 = 51,678.12/x
  3. Step 3: Cross multiply
    85,688.97x = 118,214.13 × 51,678.12
  4. Step 4: Simplify right side
    85,688.97x = 6,109,083,995.84
  5. Step 5: Solve for x
    x = 6,109,083,995.84/85,688.97
  6. Step 6: Final answer
    x = 71,293.70

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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.