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Finding the Fourth Proportional to 93,411.09, 128,910.14 and 53,130.64

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Solution

The fourth proportional to 93,411.09, 128,910.14 and 53,130.64 is: 73,321.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,411.09 : 128,910.14 = 53,130.64 : x
  2. Step 2: Convert to fraction form
    93,411.09/128,910.14 = 53,130.64/x
  3. Step 3: Cross multiply
    93,411.09x = 128,910.14 × 53,130.64
  4. Step 4: Simplify right side
    93,411.09x = 6,849,078,240.69
  5. Step 5: Solve for x
    x = 6,849,078,240.69/93,411.09
  6. Step 6: Final answer
    x = 73,321.90

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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.