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Finding the Fourth Proportional to 118,005.80, 177,008.70 and 76,015.40

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Solution

The fourth proportional to 118,005.80, 177,008.70 and 76,015.40 is: 114,023.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,005.80 : 177,008.70 = 76,015.40 : x
  2. Step 2: Convert to fraction form
    118,005.80/177,008.70 = 76,015.40/x
  3. Step 3: Cross multiply
    118,005.80x = 177,008.70 × 76,015.40
  4. Step 4: Simplify right side
    118,005.80x = 13,455,387,133.98
  5. Step 5: Solve for x
    x = 13,455,387,133.98/118,005.80
  6. Step 6: Final answer
    x = 114,023.10

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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.