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Finding the Fourth Proportional to 77,661.60, 116,492.40 and 46,480.80

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Solution

The fourth proportional to 77,661.60, 116,492.40 and 46,480.80 is: 69,721.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,661.60 : 116,492.40 = 46,480.80 : x
  2. Step 2: Convert to fraction form
    77,661.60/116,492.40 = 46,480.80/x
  3. Step 3: Cross multiply
    77,661.60x = 116,492.40 × 46,480.80
  4. Step 4: Simplify right side
    77,661.60x = 5,414,659,945.92
  5. Step 5: Solve for x
    x = 5,414,659,945.92/77,661.60
  6. Step 6: Final answer
    x = 69,721.20

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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.