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Finding the Fourth Proportional to 113,979, 157,291.08 and 63,678

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Solution

The fourth proportional to 113,979, 157,291.08 and 63,678 is: 87,875.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,979 : 157,291.08 = 63,678 : x
  2. Step 2: Convert to fraction form
    113,979/157,291.08 = 63,678/x
  3. Step 3: Cross multiply
    113,979x = 157,291.08 × 63,678
  4. Step 4: Simplify right side
    113,979x = 10,015,981,392.24
  5. Step 5: Solve for x
    x = 10,015,981,392.24/113,979
  6. Step 6: Final answer
    x = 87,875.67

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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.