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Finding the Fourth Proportional to 255,534.36, 383,359.86 and 78,066.60

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Solution

The fourth proportional to 255,534.36, 383,359.86 and 78,066.60 is: 117,117.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,534.36 : 383,359.86 = 78,066.60 : x
  2. Step 2: Convert to fraction form
    255,534.36/383,359.86 = 78,066.60/x
  3. Step 3: Cross multiply
    255,534.36x = 383,359.86 × 78,066.60
  4. Step 4: Simplify right side
    255,534.36x = 29,927,600,846.68
  5. Step 5: Solve for x
    x = 29,927,600,846.68/255,534.36
  6. Step 6: Final answer
    x = 117,117.72

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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.