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Finding the Fourth Proportional to 93,889, 129,566.82 and 54,145

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Solution

The fourth proportional to 93,889, 129,566.82 and 54,145 is: 74,720.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,889 : 129,566.82 = 54,145 : x
  2. Step 2: Convert to fraction form
    93,889/129,566.82 = 54,145/x
  3. Step 3: Cross multiply
    93,889x = 129,566.82 × 54,145
  4. Step 4: Simplify right side
    93,889x = 7,015,395,468.90
  5. Step 5: Solve for x
    x = 7,015,395,468.90/93,889
  6. Step 6: Final answer
    x = 74,720.10

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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.