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Finding the Fourth Proportional to 100,335, 138,483.90 and 60,057.75

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Solution

The fourth proportional to 100,335, 138,483.90 and 60,057.75 is: 82,892.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,335 : 138,483.90 = 60,057.75 : x
  2. Step 2: Convert to fraction form
    100,335/138,483.90 = 60,057.75/x
  3. Step 3: Cross multiply
    100,335x = 138,483.90 × 60,057.75
  4. Step 4: Simplify right side
    100,335x = 8,317,031,445.23
  5. Step 5: Solve for x
    x = 8,317,031,445.23/100,335
  6. Step 6: Final answer
    x = 82,892.62

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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.