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Finding the Fourth Proportional to 93,458, 128,970.39 and 53,170.90

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Solution

The fourth proportional to 93,458, 128,970.39 and 53,170.90 is: 73,374.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,458 : 128,970.39 = 53,170.90 : x
  2. Step 2: Convert to fraction form
    93,458/128,970.39 = 53,170.90/x
  3. Step 3: Cross multiply
    93,458x = 128,970.39 × 53,170.90
  4. Step 4: Simplify right side
    93,458x = 6,857,471,709.65
  5. Step 5: Solve for x
    x = 6,857,471,709.65/93,458
  6. Step 6: Final answer
    x = 73,374.90

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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.