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Finding the Fourth Proportional to 93,110.85, 128,558.40 and 72,715.92

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Solution

The fourth proportional to 93,110.85, 128,558.40 and 72,715.92 is: 100,399.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,110.85 : 128,558.40 = 72,715.92 : x
  2. Step 2: Convert to fraction form
    93,110.85/128,558.40 = 72,715.92/x
  3. Step 3: Cross multiply
    93,110.85x = 128,558.40 × 72,715.92
  4. Step 4: Simplify right side
    93,110.85x = 9,348,242,329.73
  5. Step 5: Solve for x
    x = 9,348,242,329.73/93,110.85
  6. Step 6: Final answer
    x = 100,399.07

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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.