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Finding the Fourth Proportional to 66,300,709.60, 99,461,950.80 and 20,851,544.80

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Solution

The fourth proportional to 66,300,709.60, 99,461,950.80 and 20,851,544.80 is: 31,280,740.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,300,709.60 : 99,461,950.80 = 20,851,544.80 : x
  2. Step 2: Convert to fraction form
    66,300,709.60/99,461,950.80 = 20,851,544.80/x
  3. Step 3: Cross multiply
    66,300,709.60x = 99,461,950.80 × 20,851,544.80
  4. Step 4: Simplify right side
    66,300,709.60x = 2,073,935,323,001,595.75
  5. Step 5: Solve for x
    x = 2,073,935,323,001,595.75/66,300,709.60
  6. Step 6: Final answer
    x = 31,280,740.97

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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.