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Finding the Fourth Proportional to 93,411.12, 128,910.99 and 53,128.56

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Solution

The fourth proportional to 93,411.12, 128,910.99 and 53,128.56 is: 73,319.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,411.12 : 128,910.99 = 53,128.56 : x
  2. Step 2: Convert to fraction form
    93,411.12/128,910.99 = 53,128.56/x
  3. Step 3: Cross multiply
    93,411.12x = 128,910.99 × 53,128.56
  4. Step 4: Simplify right side
    93,411.12x = 6,848,855,266.87
  5. Step 5: Solve for x
    x = 6,848,855,266.87/93,411.12
  6. Step 6: Final answer
    x = 73,319.49

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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.