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Finding the Fourth Proportional to 118,731.60, 178,097.40 and 79,009.20

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Solution

The fourth proportional to 118,731.60, 178,097.40 and 79,009.20 is: 118,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,731.60 : 178,097.40 = 79,009.20 : x
  2. Step 2: Convert to fraction form
    118,731.60/178,097.40 = 79,009.20/x
  3. Step 3: Cross multiply
    118,731.60x = 178,097.40 × 79,009.20
  4. Step 4: Simplify right side
    118,731.60x = 14,071,333,096.08
  5. Step 5: Solve for x
    x = 14,071,333,096.08/118,731.60
  6. Step 6: Final answer
    x = 118,513.80

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1.5x scale

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.