Home / 81,686,344.74-122,565,700.79-42,815,558.94

Finding the Fourth Proportional to 81,686,344.74, 122,565,700.79 and 42,815,558.94

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Solution

The fourth proportional to 81,686,344.74, 122,565,700.79 and 42,815,558.94 is: 64,242,303.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,686,344.74 : 122,565,700.79 = 42,815,558.94 : x
  2. Step 2: Convert to fraction form
    81,686,344.74/122,565,700.79 = 42,815,558.94/x
  3. Step 3: Cross multiply
    81,686,344.74x = 122,565,700.79 × 42,815,558.94
  4. Step 4: Simplify right side
    81,686,344.74x = 5,247,718,985,982,571
  5. Step 5: Solve for x
    x = 5,247,718,985,982,571/81,686,344.74
  6. Step 6: Final answer
    x = 64,242,303.93

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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.