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Finding the Fourth Proportional to 91,345.95, 136,870.70 and 46,910.97

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Solution

The fourth proportional to 91,345.95, 136,870.70 and 46,910.97 is: 70,290.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,345.95 : 136,870.70 = 46,910.97 : x
  2. Step 2: Convert to fraction form
    91,345.95/136,870.70 = 46,910.97/x
  3. Step 3: Cross multiply
    91,345.95x = 136,870.70 × 46,910.97
  4. Step 4: Simplify right side
    91,345.95x = 6,420,737,067.02
  5. Step 5: Solve for x
    x = 6,420,737,067.02/91,345.95
  6. Step 6: Final answer
    x = 70,290.33

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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.