Home / 120,405.15-166,160.31-72,649.29

Finding the Fourth Proportional to 120,405.15, 166,160.31 and 72,649.29

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Solution

The fourth proportional to 120,405.15, 166,160.31 and 72,649.29 is: 100,256.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,405.15 : 166,160.31 = 72,649.29 : x
  2. Step 2: Convert to fraction form
    120,405.15/166,160.31 = 72,649.29/x
  3. Step 3: Cross multiply
    120,405.15x = 166,160.31 × 72,649.29
  4. Step 4: Simplify right side
    120,405.15x = 12,071,428,547.68
  5. Step 5: Solve for x
    x = 12,071,428,547.68/120,405.15
  6. Step 6: Final answer
    x = 100,256.75

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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.