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Finding the Fourth Proportional to 118,359.40, 177,539.10 and 78,701.80

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Solution

The fourth proportional to 118,359.40, 177,539.10 and 78,701.80 is: 118,052.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,359.40 : 177,539.10 = 78,701.80 : x
  2. Step 2: Convert to fraction form
    118,359.40/177,539.10 = 78,701.80/x
  3. Step 3: Cross multiply
    118,359.40x = 177,539.10 × 78,701.80
  4. Step 4: Simplify right side
    118,359.40x = 13,972,646,740.38
  5. Step 5: Solve for x
    x = 13,972,646,740.38/118,359.40
  6. Step 6: Final answer
    x = 118,052.70

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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.