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Finding the Fourth Proportional to 93,424.96, 128,892.70 and 71,921.28

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Solution

The fourth proportional to 93,424.96, 128,892.70 and 71,921.28 is: 99,225.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,424.96 : 128,892.70 = 71,921.28 : x
  2. Step 2: Convert to fraction form
    93,424.96/128,892.70 = 71,921.28/x
  3. Step 3: Cross multiply
    93,424.96x = 128,892.70 × 71,921.28
  4. Step 4: Simplify right side
    93,424.96x = 9,270,127,966.66
  5. Step 5: Solve for x
    x = 9,270,127,966.66/93,424.96
  6. Step 6: Final answer
    x = 99,225.39

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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.