Home / 121,428.80-182,132.96-68,672.32

Finding the Fourth Proportional to 121,428.80, 182,132.96 and 68,672.32

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Solution

The fourth proportional to 121,428.80, 182,132.96 and 68,672.32 is: 103,002.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,428.80 : 182,132.96 = 68,672.32 : x
  2. Step 2: Convert to fraction form
    121,428.80/182,132.96 = 68,672.32/x
  3. Step 3: Cross multiply
    121,428.80x = 182,132.96 × 68,672.32
  4. Step 4: Simplify right side
    121,428.80x = 12,507,492,911.67
  5. Step 5: Solve for x
    x = 12,507,492,911.67/121,428.80
  6. Step 6: Final answer
    x = 103,002.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.