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Finding the Fourth Proportional to 92,920.90, 128,231.01 and 50,479.48

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Solution

The fourth proportional to 92,920.90, 128,231.01 and 50,479.48 is: 69,661.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,920.90 : 128,231.01 = 50,479.48 : x
  2. Step 2: Convert to fraction form
    92,920.90/128,231.01 = 50,479.48/x
  3. Step 3: Cross multiply
    92,920.90x = 128,231.01 × 50,479.48
  4. Step 4: Simplify right side
    92,920.90x = 6,473,034,704.67
  5. Step 5: Solve for x
    x = 6,473,034,704.67/92,920.90
  6. Step 6: Final answer
    x = 69,661.77

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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.