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Finding the Fourth Proportional to 93,424.94, 128,892.72 and 71,921.26

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Solution

The fourth proportional to 93,424.94, 128,892.72 and 71,921.26 is: 99,225.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,424.94 : 128,892.72 = 71,921.26 : x
  2. Step 2: Convert to fraction form
    93,424.94/128,892.72 = 71,921.26/x
  3. Step 3: Cross multiply
    93,424.94x = 128,892.72 × 71,921.26
  4. Step 4: Simplify right side
    93,424.94x = 9,270,126,827.23
  5. Step 5: Solve for x
    x = 9,270,126,827.23/93,424.94
  6. Step 6: Final answer
    x = 99,225.40

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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.