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Finding the Fourth Proportional to 79,515.50, 109,728.92 and 43,705.40

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Solution

The fourth proportional to 79,515.50, 109,728.92 and 43,705.40 is: 60,312.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,515.50 : 109,728.92 = 43,705.40 : x
  2. Step 2: Convert to fraction form
    79,515.50/109,728.92 = 43,705.40/x
  3. Step 3: Cross multiply
    79,515.50x = 109,728.92 × 43,705.40
  4. Step 4: Simplify right side
    79,515.50x = 4,795,746,340.17
  5. Step 5: Solve for x
    x = 4,795,746,340.17/79,515.50
  6. Step 6: Final answer
    x = 60,312.09

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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.