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Finding the Fourth Proportional to 77,264,928.60, 115,897,392.90 and 19,761,700.20

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Solution

The fourth proportional to 77,264,928.60, 115,897,392.90 and 19,761,700.20 is: 29,642,550.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,264,928.60 : 115,897,392.90 = 19,761,700.20 : x
  2. Step 2: Convert to fraction form
    77,264,928.60/115,897,392.90 = 19,761,700.20/x
  3. Step 3: Cross multiply
    77,264,928.60x = 115,897,392.90 × 19,761,700.20
  4. Step 4: Simplify right side
    77,264,928.60x = 2,290,329,532,451,408.50
  5. Step 5: Solve for x
    x = 2,290,329,532,451,408.50/77,264,928.60
  6. Step 6: Final answer
    x = 29,642,550.30

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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.