Home / 76,985.64-115,434.72-30,213

Finding the Fourth Proportional to 76,985.64, 115,434.72 and 30,213

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Solution

The fourth proportional to 76,985.64, 115,434.72 and 30,213 is: 45,302.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,985.64 : 115,434.72 = 30,213 : x
  2. Step 2: Convert to fraction form
    76,985.64/115,434.72 = 30,213/x
  3. Step 3: Cross multiply
    76,985.64x = 115,434.72 × 30,213
  4. Step 4: Simplify right side
    76,985.64x = 3,487,629,195.36
  5. Step 5: Solve for x
    x = 3,487,629,195.36/76,985.64
  6. Step 6: Final answer
    x = 45,302.33

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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.