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Finding the Fourth Proportional to 92,890.21, 128,241.62 and 61,151.37

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Solution

The fourth proportional to 92,890.21, 128,241.62 and 61,151.37 is: 84,423.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,890.21 : 128,241.62 = 61,151.37 : x
  2. Step 2: Convert to fraction form
    92,890.21/128,241.62 = 61,151.37/x
  3. Step 3: Cross multiply
    92,890.21x = 128,241.62 × 61,151.37
  4. Step 4: Simplify right side
    92,890.21x = 7,842,150,754.02
  5. Step 5: Solve for x
    x = 7,842,150,754.02/92,890.21
  6. Step 6: Final answer
    x = 84,423.87

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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.