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Finding the Fourth Proportional to 93,324.80, 139,987.20 and 81,660.80

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Solution

The fourth proportional to 93,324.80, 139,987.20 and 81,660.80 is: 122,491.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,324.80 : 139,987.20 = 81,660.80 : x
  2. Step 2: Convert to fraction form
    93,324.80/139,987.20 = 81,660.80/x
  3. Step 3: Cross multiply
    93,324.80x = 139,987.20 × 81,660.80
  4. Step 4: Simplify right side
    93,324.80x = 11,431,466,741.76
  5. Step 5: Solve for x
    x = 11,431,466,741.76/93,324.80
  6. Step 6: Final answer
    x = 122,491.20

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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.