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Finding the Fourth Proportional to 128,732.95, 193,073.03 and 48,743.32

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Solution

The fourth proportional to 128,732.95, 193,073.03 and 48,743.32 is: 73,104.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,732.95 : 193,073.03 = 48,743.32 : x
  2. Step 2: Convert to fraction form
    128,732.95/193,073.03 = 48,743.32/x
  3. Step 3: Cross multiply
    128,732.95x = 193,073.03 × 48,743.32
  4. Step 4: Simplify right side
    128,732.95x = 9,411,019,275.58
  5. Step 5: Solve for x
    x = 9,411,019,275.58/128,732.95
  6. Step 6: Final answer
    x = 73,104.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.