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Finding the Fourth Proportional to 93,412.29, 128,911.80 and 53,131.86

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Solution

The fourth proportional to 93,412.29, 128,911.80 and 53,131.86 is: 73,323.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,412.29 : 128,911.80 = 53,131.86 : x
  2. Step 2: Convert to fraction form
    93,412.29/128,911.80 = 53,131.86/x
  3. Step 3: Cross multiply
    93,412.29x = 128,911.80 × 53,131.86
  4. Step 4: Simplify right side
    93,412.29x = 6,849,323,709.95
  5. Step 5: Solve for x
    x = 6,849,323,709.95/93,412.29
  6. Step 6: Final answer
    x = 73,323.58

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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.