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Finding the Fourth Proportional to 76,923.78, 106,154.76 and 43,389.78

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Solution

The fourth proportional to 76,923.78, 106,154.76 and 43,389.78 is: 59,877.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,923.78 : 106,154.76 = 43,389.78 : x
  2. Step 2: Convert to fraction form
    76,923.78/106,154.76 = 43,389.78/x
  3. Step 3: Cross multiply
    76,923.78x = 106,154.76 × 43,389.78
  4. Step 4: Simplify right side
    76,923.78x = 4,606,031,682.35
  5. Step 5: Solve for x
    x = 4,606,031,682.35/76,923.78
  6. Step 6: Final answer
    x = 59,877.86

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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.