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Finding the Fourth Proportional to 93,100.40, 139,650.60 and 72,338.80

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Solution

The fourth proportional to 93,100.40, 139,650.60 and 72,338.80 is: 108,508.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,100.40 : 139,650.60 = 72,338.80 : x
  2. Step 2: Convert to fraction form
    93,100.40/139,650.60 = 72,338.80/x
  3. Step 3: Cross multiply
    93,100.40x = 139,650.60 × 72,338.80
  4. Step 4: Simplify right side
    93,100.40x = 10,102,156,823.28
  5. Step 5: Solve for x
    x = 10,102,156,823.28/93,100.40
  6. Step 6: Final answer
    x = 108,508.20

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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.