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Finding the Fourth Proportional to 93,411.53, 128,910.75 and 53,131.08

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Solution

The fourth proportional to 93,411.53, 128,910.75 and 53,131.08 is: 73,322.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,411.53 : 128,910.75 = 53,131.08 : x
  2. Step 2: Convert to fraction form
    93,411.53/128,910.75 = 53,131.08/x
  3. Step 3: Cross multiply
    93,411.53x = 128,910.75 × 53,131.08
  4. Step 4: Simplify right side
    93,411.53x = 6,849,167,105.45
  5. Step 5: Solve for x
    x = 6,849,167,105.45/93,411.53
  6. Step 6: Final answer
    x = 73,322.51

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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.