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Finding the Fourth Proportional to 92,783.80, 128,042 and 50,342.30

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Solution

The fourth proportional to 92,783.80, 128,042 and 50,342.30 is: 69,472.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,783.80 : 128,042 = 50,342.30 : x
  2. Step 2: Convert to fraction form
    92,783.80/128,042 = 50,342.30/x
  3. Step 3: Cross multiply
    92,783.80x = 128,042 × 50,342.30
  4. Step 4: Simplify right side
    92,783.80x = 6,445,928,776.60
  5. Step 5: Solve for x
    x = 6,445,928,776.60/92,783.80
  6. Step 6: Final answer
    x = 69,472.57

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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.