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Finding the Fourth Proportional to 91,919.61, 137,848.41 and 34,980

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Solution

The fourth proportional to 91,919.61, 137,848.41 and 34,980 is: 52,458.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,919.61 : 137,848.41 = 34,980 : x
  2. Step 2: Convert to fraction form
    91,919.61/137,848.41 = 34,980/x
  3. Step 3: Cross multiply
    91,919.61x = 137,848.41 × 34,980
  4. Step 4: Simplify right side
    91,919.61x = 4,821,937,381.80
  5. Step 5: Solve for x
    x = 4,821,937,381.80/91,919.61
  6. Step 6: Final answer
    x = 52,458.20

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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.