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Finding the Fourth Proportional to 68,438.40, 94,444.80 and 38,630.40

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Solution

The fourth proportional to 68,438.40, 94,444.80 and 38,630.40 is: 53,309.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,438.40 : 94,444.80 = 38,630.40 : x
  2. Step 2: Convert to fraction form
    68,438.40/94,444.80 = 38,630.40/x
  3. Step 3: Cross multiply
    68,438.40x = 94,444.80 × 38,630.40
  4. Step 4: Simplify right side
    68,438.40x = 3,648,440,401.92
  5. Step 5: Solve for x
    x = 3,648,440,401.92/68,438.40
  6. Step 6: Final answer
    x = 53,309.84

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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.