Home / 78,165,905.20-117,248,857.80-66,576,554.80

Finding the Fourth Proportional to 78,165,905.20, 117,248,857.80 and 66,576,554.80

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Solution

The fourth proportional to 78,165,905.20, 117,248,857.80 and 66,576,554.80 is: 99,864,832.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,165,905.20 : 117,248,857.80 = 66,576,554.80 : x
  2. Step 2: Convert to fraction form
    78,165,905.20/117,248,857.80 = 66,576,554.80/x
  3. Step 3: Cross multiply
    78,165,905.20x = 117,248,857.80 × 66,576,554.80
  4. Step 4: Simplify right side
    78,165,905.20x = 7,806,025,006,559,107
  5. Step 5: Solve for x
    x = 7,806,025,006,559,107/78,165,905.20
  6. Step 6: Final answer
    x = 99,864,832.20

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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.