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Finding the Fourth Proportional to 66,779,931.20, 100,169,896.80 and 49,561,242.80

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Solution

The fourth proportional to 66,779,931.20, 100,169,896.80 and 49,561,242.80 is: 74,341,864.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,779,931.20 : 100,169,896.80 = 49,561,242.80 : x
  2. Step 2: Convert to fraction form
    66,779,931.20/100,169,896.80 = 49,561,242.80/x
  3. Step 3: Cross multiply
    66,779,931.20x = 100,169,896.80 × 49,561,242.80
  4. Step 4: Simplify right side
    66,779,931.20x = 4,964,544,576,555,743
  5. Step 5: Solve for x
    x = 4,964,544,576,555,743/66,779,931.20
  6. Step 6: Final answer
    x = 74,341,864.20

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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.