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Finding the Fourth Proportional to 170,425.80, 255,636.30 and 76,931.40

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Solution

The fourth proportional to 170,425.80, 255,636.30 and 76,931.40 is: 115,396.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,425.80 : 255,636.30 = 76,931.40 : x
  2. Step 2: Convert to fraction form
    170,425.80/255,636.30 = 76,931.40/x
  3. Step 3: Cross multiply
    170,425.80x = 255,636.30 × 76,931.40
  4. Step 4: Simplify right side
    170,425.80x = 19,666,458,449.82
  5. Step 5: Solve for x
    x = 19,666,458,449.82/170,425.80
  6. Step 6: Final answer
    x = 115,396.02

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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.