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Finding the Fourth Proportional to 93,380.71, 128,986.93 and 75,543

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Solution

The fourth proportional to 93,380.71, 128,986.93 and 75,543 is: 104,347.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,380.71 : 128,986.93 = 75,543 : x
  2. Step 2: Convert to fraction form
    93,380.71/128,986.93 = 75,543/x
  3. Step 3: Cross multiply
    93,380.71x = 128,986.93 × 75,543
  4. Step 4: Simplify right side
    93,380.71x = 9,744,059,652.99
  5. Step 5: Solve for x
    x = 9,744,059,652.99/93,380.71
  6. Step 6: Final answer
    x = 104,347.67

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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.