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Finding the Fourth Proportional to 66,434,681.80, 99,652,022.70 and 55,664,144.20

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Solution

The fourth proportional to 66,434,681.80, 99,652,022.70 and 55,664,144.20 is: 83,496,216.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,434,681.80 : 99,652,022.70 = 55,664,144.20 : x
  2. Step 2: Convert to fraction form
    66,434,681.80/99,652,022.70 = 55,664,144.20/x
  3. Step 3: Cross multiply
    66,434,681.80x = 99,652,022.70 × 55,664,144.20
  4. Step 4: Simplify right side
    66,434,681.80x = 5,547,044,561,394,474
  5. Step 5: Solve for x
    x = 5,547,044,561,394,474/66,434,681.80
  6. Step 6: Final answer
    x = 83,496,216.30

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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.