Home / 121,877.28-168,160.32-76,562.64

Finding the Fourth Proportional to 121,877.28, 168,160.32 and 76,562.64

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Solution

The fourth proportional to 121,877.28, 168,160.32 and 76,562.64 is: 105,637.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,877.28 : 168,160.32 = 76,562.64 : x
  2. Step 2: Convert to fraction form
    121,877.28/168,160.32 = 76,562.64/x
  3. Step 3: Cross multiply
    121,877.28x = 168,160.32 × 76,562.64
  4. Step 4: Simplify right side
    121,877.28x = 12,874,798,042.44
  5. Step 5: Solve for x
    x = 12,874,798,042.44/121,877.28
  6. Step 6: Final answer
    x = 105,637.39

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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.