Home / 81,581,266.80-122,371,900.20-78,445,983.60

Finding the Fourth Proportional to 81,581,266.80, 122,371,900.20 and 78,445,983.60

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Solution

The fourth proportional to 81,581,266.80, 122,371,900.20 and 78,445,983.60 is: 117,668,975.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,581,266.80 : 122,371,900.20 = 78,445,983.60 : x
  2. Step 2: Convert to fraction form
    81,581,266.80/122,371,900.20 = 78,445,983.60/x
  3. Step 3: Cross multiply
    81,581,266.80x = 122,371,900.20 × 78,445,983.60
  4. Step 4: Simplify right side
    81,581,266.80x = 9,599,584,076,190,036
  5. Step 5: Solve for x
    x = 9,599,584,076,190,036/81,581,266.80
  6. Step 6: Final answer
    x = 117,668,975.40

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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.