Home / 81,678,642.60-122,517,963.90-81,111,772.20

Finding the Fourth Proportional to 81,678,642.60, 122,517,963.90 and 81,111,772.20

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Solution

The fourth proportional to 81,678,642.60, 122,517,963.90 and 81,111,772.20 is: 121,667,658.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,678,642.60 : 122,517,963.90 = 81,111,772.20 : x
  2. Step 2: Convert to fraction form
    81,678,642.60/122,517,963.90 = 81,111,772.20/x
  3. Step 3: Cross multiply
    81,678,642.60x = 122,517,963.90 × 81,111,772.20
  4. Step 4: Simplify right side
    81,678,642.60x = 9,937,649,178,264,624
  5. Step 5: Solve for x
    x = 9,937,649,178,264,624/81,678,642.60
  6. Step 6: Final answer
    x = 121,667,658.30

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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.