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Finding the Fourth Proportional to 77,865,376.80, 116,798,065.20 and 20,363,460.60

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Solution

The fourth proportional to 77,865,376.80, 116,798,065.20 and 20,363,460.60 is: 30,545,190.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,865,376.80 : 116,798,065.20 = 20,363,460.60 : x
  2. Step 2: Convert to fraction form
    77,865,376.80/116,798,065.20 = 20,363,460.60/x
  3. Step 3: Cross multiply
    77,865,376.80x = 116,798,065.20 × 20,363,460.60
  4. Step 4: Simplify right side
    77,865,376.80x = 2,378,412,798,856,431.50
  5. Step 5: Solve for x
    x = 2,378,412,798,856,431.50/77,865,376.80
  6. Step 6: Final answer
    x = 30,545,190.90

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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.