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Finding the Fourth Proportional to 92,809.38, 128,069.85 and 54,570.48

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Solution

The fourth proportional to 92,809.38, 128,069.85 and 54,570.48 is: 75,303.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,809.38 : 128,069.85 = 54,570.48 : x
  2. Step 2: Convert to fraction form
    92,809.38/128,069.85 = 54,570.48/x
  3. Step 3: Cross multiply
    92,809.38x = 128,069.85 × 54,570.48
  4. Step 4: Simplify right side
    92,809.38x = 6,988,833,188.03
  5. Step 5: Solve for x
    x = 6,988,833,188.03/92,809.38
  6. Step 6: Final answer
    x = 75,303.09

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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.