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Finding the Fourth Proportional to 118,834.74, 178,132.10 and 74,492.57

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Solution

The fourth proportional to 118,834.74, 178,132.10 and 74,492.57 is: 111,663.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,834.74 : 178,132.10 = 74,492.57 : x
  2. Step 2: Convert to fraction form
    118,834.74/178,132.10 = 74,492.57/x
  3. Step 3: Cross multiply
    118,834.74x = 178,132.10 × 74,492.57
  4. Step 4: Simplify right side
    118,834.74x = 13,269,518,001.36
  5. Step 5: Solve for x
    x = 13,269,518,001.36/118,834.74
  6. Step 6: Final answer
    x = 111,663.63

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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.