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Finding the Fourth Proportional to 92,920.28, 128,230.13 and 50,478.84

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Solution

The fourth proportional to 92,920.28, 128,230.13 and 50,478.84 is: 69,660.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,920.28 : 128,230.13 = 50,478.84 : x
  2. Step 2: Convert to fraction form
    92,920.28/128,230.13 = 50,478.84/x
  3. Step 3: Cross multiply
    92,920.28x = 128,230.13 × 50,478.84
  4. Step 4: Simplify right side
    92,920.28x = 6,472,908,341.65
  5. Step 5: Solve for x
    x = 6,472,908,341.65/92,920.28
  6. Step 6: Final answer
    x = 69,660.88

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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.