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Finding the Fourth Proportional to 78,685.57, 118,029.21 and 62,990.38

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Solution

The fourth proportional to 78,685.57, 118,029.21 and 62,990.38 is: 94,486.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,685.57 : 118,029.21 = 62,990.38 : x
  2. Step 2: Convert to fraction form
    78,685.57/118,029.21 = 62,990.38/x
  3. Step 3: Cross multiply
    78,685.57x = 118,029.21 × 62,990.38
  4. Step 4: Simplify right side
    78,685.57x = 7,434,704,789.00
  5. Step 5: Solve for x
    x = 7,434,704,789.00/78,685.57
  6. Step 6: Final answer
    x = 94,486.25

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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.