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Finding the Fourth Proportional to 55,706.88, 76,875.90 and 30,556.38

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Solution

The fourth proportional to 55,706.88, 76,875.90 and 30,556.38 is: 42,168.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,706.88 : 76,875.90 = 30,556.38 : x
  2. Step 2: Convert to fraction form
    55,706.88/76,875.90 = 30,556.38/x
  3. Step 3: Cross multiply
    55,706.88x = 76,875.90 × 30,556.38
  4. Step 4: Simplify right side
    55,706.88x = 2,349,049,213.24
  5. Step 5: Solve for x
    x = 2,349,049,213.24/55,706.88
  6. Step 6: Final answer
    x = 42,168.03

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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.