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Finding the Fourth Proportional to 73,913.42, 110,857.98 and 21,308.78

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Solution

The fourth proportional to 73,913.42, 110,857.98 and 21,308.78 is: 31,959.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,913.42 : 110,857.98 = 21,308.78 : x
  2. Step 2: Convert to fraction form
    73,913.42/110,857.98 = 21,308.78/x
  3. Step 3: Cross multiply
    73,913.42x = 110,857.98 × 21,308.78
  4. Step 4: Simplify right side
    73,913.42x = 2,362,248,307.06
  5. Step 5: Solve for x
    x = 2,362,248,307.06/73,913.42
  6. Step 6: Final answer
    x = 31,959.67

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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.