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Finding the Fourth Proportional to 137,398.86, 189,638.06 and 93,907.53

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Solution

The fourth proportional to 137,398.86, 189,638.06 and 93,907.53 is: 129,611.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,398.86 : 189,638.06 = 93,907.53 : x
  2. Step 2: Convert to fraction form
    137,398.86/189,638.06 = 93,907.53/x
  3. Step 3: Cross multiply
    137,398.86x = 189,638.06 × 93,907.53
  4. Step 4: Simplify right side
    137,398.86x = 17,808,441,339.05
  5. Step 5: Solve for x
    x = 17,808,441,339.05/137,398.86
  6. Step 6: Final answer
    x = 129,611.27

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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.