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Finding the Fourth Proportional to 91,784.40, 137,717.90 and 49,615.10

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Solution

The fourth proportional to 91,784.40, 137,717.90 and 49,615.10 is: 74,444.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,784.40 : 137,717.90 = 49,615.10 : x
  2. Step 2: Convert to fraction form
    91,784.40/137,717.90 = 49,615.10/x
  3. Step 3: Cross multiply
    91,784.40x = 137,717.90 × 49,615.10
  4. Step 4: Simplify right side
    91,784.40x = 6,832,887,380.29
  5. Step 5: Solve for x
    x = 6,832,887,380.29/91,784.40
  6. Step 6: Final answer
    x = 74,444.98

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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.