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Finding the Fourth Proportional to 79,496.40, 109,702.80 and 43,686.40

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Solution

The fourth proportional to 79,496.40, 109,702.80 and 43,686.40 is: 60,286.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,496.40 : 109,702.80 = 43,686.40 : x
  2. Step 2: Convert to fraction form
    79,496.40/109,702.80 = 43,686.40/x
  3. Step 3: Cross multiply
    79,496.40x = 109,702.80 × 43,686.40
  4. Step 4: Simplify right side
    79,496.40x = 4,792,520,401.92
  5. Step 5: Solve for x
    x = 4,792,520,401.92/79,496.40
  6. Step 6: Final answer
    x = 60,286.01

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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.