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Finding the Fourth Proportional to 219,887.70, 329,831.55 and 86,723.70

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Solution

The fourth proportional to 219,887.70, 329,831.55 and 86,723.70 is: 130,085.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,887.70 : 329,831.55 = 86,723.70 : x
  2. Step 2: Convert to fraction form
    219,887.70/329,831.55 = 86,723.70/x
  3. Step 3: Cross multiply
    219,887.70x = 329,831.55 × 86,723.70
  4. Step 4: Simplify right side
    219,887.70x = 28,604,212,392.74
  5. Step 5: Solve for x
    x = 28,604,212,392.74/219,887.70
  6. Step 6: Final answer
    x = 130,085.55

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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.