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Finding the Fourth Proportional to 118,814.40, 178,077.60 and 68,798.40

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Solution

The fourth proportional to 118,814.40, 178,077.60 and 68,798.40 is: 103,114.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,814.40 : 178,077.60 = 68,798.40 : x
  2. Step 2: Convert to fraction form
    118,814.40/178,077.60 = 68,798.40/x
  3. Step 3: Cross multiply
    118,814.40x = 178,077.60 × 68,798.40
  4. Step 4: Simplify right side
    118,814.40x = 12,251,453,955.84
  5. Step 5: Solve for x
    x = 12,251,453,955.84/118,814.40
  6. Step 6: Final answer
    x = 103,114.22

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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.