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Finding the Fourth Proportional to 71,946.80, 107,920.20 and 65,495.60

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Solution

The fourth proportional to 71,946.80, 107,920.20 and 65,495.60 is: 98,243.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,946.80 : 107,920.20 = 65,495.60 : x
  2. Step 2: Convert to fraction form
    71,946.80/107,920.20 = 65,495.60/x
  3. Step 3: Cross multiply
    71,946.80x = 107,920.20 × 65,495.60
  4. Step 4: Simplify right side
    71,946.80x = 7,068,298,251.12
  5. Step 5: Solve for x
    x = 7,068,298,251.12/71,946.80
  6. Step 6: Final answer
    x = 98,243.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.