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Finding the Fourth Proportional to 119,139, 178,670.63 and 39,158.52

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Solution

The fourth proportional to 119,139, 178,670.63 and 39,158.52 is: 58,725.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,139 : 178,670.63 = 39,158.52 : x
  2. Step 2: Convert to fraction form
    119,139/178,670.63 = 39,158.52/x
  3. Step 3: Cross multiply
    119,139x = 178,670.63 × 39,158.52
  4. Step 4: Simplify right side
    119,139x = 6,996,477,242.48
  5. Step 5: Solve for x
    x = 6,996,477,242.48/119,139
  6. Step 6: Final answer
    x = 58,725.33

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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.