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Finding the Fourth Proportional to 92,870, 128,160.60 and 53,126

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Solution

The fourth proportional to 92,870, 128,160.60 and 53,126 is: 73,313.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,870 : 128,160.60 = 53,126 : x
  2. Step 2: Convert to fraction form
    92,870/128,160.60 = 53,126/x
  3. Step 3: Cross multiply
    92,870x = 128,160.60 × 53,126
  4. Step 4: Simplify right side
    92,870x = 6,808,660,035.60
  5. Step 5: Solve for x
    x = 6,808,660,035.60/92,870
  6. Step 6: Final answer
    x = 73,313.88

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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.