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Finding the Fourth Proportional to 78,289.70, 117,283.40 and 46,724.97

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Solution

The fourth proportional to 78,289.70, 117,283.40 and 46,724.97 is: 69,997.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,289.70 : 117,283.40 = 46,724.97 : x
  2. Step 2: Convert to fraction form
    78,289.70/117,283.40 = 46,724.97/x
  3. Step 3: Cross multiply
    78,289.70x = 117,283.40 × 46,724.97
  4. Step 4: Simplify right side
    78,289.70x = 5,480,063,346.50
  5. Step 5: Solve for x
    x = 5,480,063,346.50/78,289.70
  6. Step 6: Final answer
    x = 69,997.25

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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.