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Finding the Fourth Proportional to 219,831.32, 329,779.78 and 79,557.14

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Solution

The fourth proportional to 219,831.32, 329,779.78 and 79,557.14 is: 119,347.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,831.32 : 329,779.78 = 79,557.14 : x
  2. Step 2: Convert to fraction form
    219,831.32/329,779.78 = 79,557.14/x
  3. Step 3: Cross multiply
    219,831.32x = 329,779.78 × 79,557.14
  4. Step 4: Simplify right side
    219,831.32x = 26,236,336,126.63
  5. Step 5: Solve for x
    x = 26,236,336,126.63/219,831.32
  6. Step 6: Final answer
    x = 119,347.58

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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.