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Finding the Fourth Proportional to 92,905.70, 128,187.86 and 54,666.90

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Solution

The fourth proportional to 92,905.70, 128,187.86 and 54,666.90 is: 75,427.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,905.70 : 128,187.86 = 54,666.90 : x
  2. Step 2: Convert to fraction form
    92,905.70/128,187.86 = 54,666.90/x
  3. Step 3: Cross multiply
    92,905.70x = 128,187.86 × 54,666.90
  4. Step 4: Simplify right side
    92,905.70x = 7,007,632,650.50
  5. Step 5: Solve for x
    x = 7,007,632,650.50/92,905.70
  6. Step 6: Final answer
    x = 75,427.37

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1.5x scale

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.