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Finding the Fourth Proportional to 118,688.60, 178,133.70 and 48,618.20

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Solution

The fourth proportional to 118,688.60, 178,133.70 and 48,618.20 is: 72,968.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,688.60 : 178,133.70 = 48,618.20 : x
  2. Step 2: Convert to fraction form
    118,688.60/178,133.70 = 48,618.20/x
  3. Step 3: Cross multiply
    118,688.60x = 178,133.70 × 48,618.20
  4. Step 4: Simplify right side
    118,688.60x = 8,660,539,853.34
  5. Step 5: Solve for x
    x = 8,660,539,853.34/118,688.60
  6. Step 6: Final answer
    x = 72,968.59

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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.