Home / 81,686,356.67-122,565,718.60-42,815,570.83

Finding the Fourth Proportional to 81,686,356.67, 122,565,718.60 and 42,815,570.83

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Solution

The fourth proportional to 81,686,356.67, 122,565,718.60 and 42,815,570.83 is: 64,242,321.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,686,356.67 : 122,565,718.60 = 42,815,570.83 : x
  2. Step 2: Convert to fraction form
    81,686,356.67/122,565,718.60 = 42,815,570.83/x
  3. Step 3: Cross multiply
    81,686,356.67x = 122,565,718.60 × 42,815,570.83
  4. Step 4: Simplify right side
    81,686,356.67x = 5,247,721,205,634,695
  5. Step 5: Solve for x
    x = 5,247,721,205,634,695/81,686,356.67
  6. Step 6: Final answer
    x = 64,242,321.72

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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.