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Finding the Fourth Proportional to 66,300,708.60, 99,461,949.30 and 20,851,543.80

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Solution

The fourth proportional to 66,300,708.60, 99,461,949.30 and 20,851,543.80 is: 31,280,739.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,300,708.60 : 99,461,949.30 = 20,851,543.80 : x
  2. Step 2: Convert to fraction form
    66,300,708.60/99,461,949.30 = 20,851,543.80/x
  3. Step 3: Cross multiply
    66,300,708.60x = 99,461,949.30 × 20,851,543.80
  4. Step 4: Simplify right side
    66,300,708.60x = 2,073,935,192,262,329.25
  5. Step 5: Solve for x
    x = 2,073,935,192,262,329.25/66,300,708.60
  6. Step 6: Final answer
    x = 31,280,739.47

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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.