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Finding the Fourth Proportional to 92,790, 128,069.28 and 52,506

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Solution

The fourth proportional to 92,790, 128,069.28 and 52,506 is: 72,469.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,790 : 128,069.28 = 52,506 : x
  2. Step 2: Convert to fraction form
    92,790/128,069.28 = 52,506/x
  3. Step 3: Cross multiply
    92,790x = 128,069.28 × 52,506
  4. Step 4: Simplify right side
    92,790x = 6,724,405,615.68
  5. Step 5: Solve for x
    x = 6,724,405,615.68/92,790
  6. Step 6: Final answer
    x = 72,469.08

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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.