Home / 81,551,206.80-122,326,810.20-78,415,923.60

Finding the Fourth Proportional to 81,551,206.80, 122,326,810.20 and 78,415,923.60

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Solution

The fourth proportional to 81,551,206.80, 122,326,810.20 and 78,415,923.60 is: 117,623,885.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,551,206.80 : 122,326,810.20 = 78,415,923.60 : x
  2. Step 2: Convert to fraction form
    81,551,206.80/122,326,810.20 = 78,415,923.60/x
  3. Step 3: Cross multiply
    81,551,206.80x = 122,326,810.20 × 78,415,923.60
  4. Step 4: Simplify right side
    81,551,206.80x = 9,592,369,802,874,900
  5. Step 5: Solve for x
    x = 9,592,369,802,874,900/81,551,206.80
  6. Step 6: Final answer
    x = 117,623,885.40

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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.