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Finding the Fourth Proportional to 93,304, 128,805.49 and 64,645.39

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Solution

The fourth proportional to 93,304, 128,805.49 and 64,645.39 is: 89,242.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,304 : 128,805.49 = 64,645.39 : x
  2. Step 2: Convert to fraction form
    93,304/128,805.49 = 64,645.39/x
  3. Step 3: Cross multiply
    93,304x = 128,805.49 × 64,645.39
  4. Step 4: Simplify right side
    93,304x = 8,326,680,973.58
  5. Step 5: Solve for x
    x = 8,326,680,973.58/93,304
  6. Step 6: Final answer
    x = 89,242.49

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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.