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Finding the Fourth Proportional to 66,986,418.30, 100,479,627.45 and 64,152,066.30

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Solution

The fourth proportional to 66,986,418.30, 100,479,627.45 and 64,152,066.30 is: 96,228,099.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,986,418.30 : 100,479,627.45 = 64,152,066.30 : x
  2. Step 2: Convert to fraction form
    66,986,418.30/100,479,627.45 = 64,152,066.30/x
  3. Step 3: Cross multiply
    66,986,418.30x = 100,479,627.45 × 64,152,066.30
  4. Step 4: Simplify right side
    66,986,418.30x = 6,445,975,721,971,700
  5. Step 5: Solve for x
    x = 6,445,975,721,971,700/66,986,418.30
  6. Step 6: Final answer
    x = 96,228,099.45

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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.