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Finding the Fourth Proportional to 50,781.76, 70,085.10 and 30,650.20

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Solution

The fourth proportional to 50,781.76, 70,085.10 and 30,650.20 is: 42,301.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,781.76 : 70,085.10 = 30,650.20 : x
  2. Step 2: Convert to fraction form
    50,781.76/70,085.10 = 30,650.20/x
  3. Step 3: Cross multiply
    50,781.76x = 70,085.10 × 30,650.20
  4. Step 4: Simplify right side
    50,781.76x = 2,148,122,332.02
  5. Step 5: Solve for x
    x = 2,148,122,332.02/50,781.76
  6. Step 6: Final answer
    x = 42,301.06

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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.