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Finding the Fourth Proportional to 66,657.60, 99,694.80 and 50,911.20

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Solution

The fourth proportional to 66,657.60, 99,694.80 and 50,911.20 is: 76,144.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,657.60 : 99,694.80 = 50,911.20 : x
  2. Step 2: Convert to fraction form
    66,657.60/99,694.80 = 50,911.20/x
  3. Step 3: Cross multiply
    66,657.60x = 99,694.80 × 50,911.20
  4. Step 4: Simplify right side
    66,657.60x = 5,075,581,901.76
  5. Step 5: Solve for x
    x = 5,075,581,901.76/66,657.60
  6. Step 6: Final answer
    x = 76,144.08

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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.