Home / 121,515.10-182,272.65-76,900.30

Finding the Fourth Proportional to 121,515.10, 182,272.65 and 76,900.30

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Solution

The fourth proportional to 121,515.10, 182,272.65 and 76,900.30 is: 115,350.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,515.10 : 182,272.65 = 76,900.30 : x
  2. Step 2: Convert to fraction form
    121,515.10/182,272.65 = 76,900.30/x
  3. Step 3: Cross multiply
    121,515.10x = 182,272.65 × 76,900.30
  4. Step 4: Simplify right side
    121,515.10x = 14,016,821,466.80
  5. Step 5: Solve for x
    x = 14,016,821,466.80/121,515.10
  6. Step 6: Final answer
    x = 115,350.45

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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.