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Finding the Fourth Proportional to 78,440.84, 108,249.20 and 42,630.85

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Solution

The fourth proportional to 78,440.84, 108,249.20 and 42,630.85 is: 58,831.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,440.84 : 108,249.20 = 42,630.85 : x
  2. Step 2: Convert to fraction form
    78,440.84/108,249.20 = 42,630.85/x
  3. Step 3: Cross multiply
    78,440.84x = 108,249.20 × 42,630.85
  4. Step 4: Simplify right side
    78,440.84x = 4,614,755,692.81
  5. Step 5: Solve for x
    x = 4,614,755,692.81/78,440.84
  6. Step 6: Final answer
    x = 58,831.03

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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.