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Finding the Fourth Proportional to 93,511.68, 129,031.68 and 53,760

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Solution

The fourth proportional to 93,511.68, 129,031.68 and 53,760 is: 74,180.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,511.68 : 129,031.68 = 53,760 : x
  2. Step 2: Convert to fraction form
    93,511.68/129,031.68 = 53,760/x
  3. Step 3: Cross multiply
    93,511.68x = 129,031.68 × 53,760
  4. Step 4: Simplify right side
    93,511.68x = 6,936,743,116.80
  5. Step 5: Solve for x
    x = 6,936,743,116.80/93,511.68
  6. Step 6: Final answer
    x = 74,180.50

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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.