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Finding the Fourth Proportional to 560,015.91, 840,022.28 and 139,291.79

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Solution

The fourth proportional to 560,015.91, 840,022.28 and 139,291.79 is: 208,937.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,015.91 : 840,022.28 = 139,291.79 : x
  2. Step 2: Convert to fraction form
    560,015.91/840,022.28 = 139,291.79/x
  3. Step 3: Cross multiply
    560,015.91x = 840,022.28 × 139,291.79
  4. Step 4: Simplify right side
    560,015.91x = 117,008,207,021.08
  5. Step 5: Solve for x
    x = 117,008,207,021.08/560,015.91
  6. Step 6: Final answer
    x = 208,937.29

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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.