Home / 79,185,915.20-118,778,872.80-66,431,331.20

Finding the Fourth Proportional to 79,185,915.20, 118,778,872.80 and 66,431,331.20

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Solution

The fourth proportional to 79,185,915.20, 118,778,872.80 and 66,431,331.20 is: 99,646,996.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,185,915.20 : 118,778,872.80 = 66,431,331.20 : x
  2. Step 2: Convert to fraction form
    79,185,915.20/118,778,872.80 = 66,431,331.20/x
  3. Step 3: Cross multiply
    79,185,915.20x = 118,778,872.80 × 66,431,331.20
  4. Step 4: Simplify right side
    79,185,915.20x = 7,890,638,638,539,472
  5. Step 5: Solve for x
    x = 7,890,638,638,539,472/79,185,915.20
  6. Step 6: Final answer
    x = 99,646,996.80

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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.