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Finding the Fourth Proportional to 92,781, 128,038.10 and 50,339.84

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Solution

The fourth proportional to 92,781, 128,038.10 and 50,339.84 is: 69,469.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,781 : 128,038.10 = 50,339.84 : x
  2. Step 2: Convert to fraction form
    92,781/128,038.10 = 50,339.84/x
  3. Step 3: Cross multiply
    92,781x = 128,038.10 × 50,339.84
  4. Step 4: Simplify right side
    92,781x = 6,445,416,576.01
  5. Step 5: Solve for x
    x = 6,445,416,576.01/92,781
  6. Step 6: Final answer
    x = 69,469.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.