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Finding the Fourth Proportional to 93,212.57, 139,114.67 and 86,892.14

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Solution

The fourth proportional to 93,212.57, 139,114.67 and 86,892.14 is: 129,681.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,212.57 : 139,114.67 = 86,892.14 : x
  2. Step 2: Convert to fraction form
    93,212.57/139,114.67 = 86,892.14/x
  3. Step 3: Cross multiply
    93,212.57x = 139,114.67 × 86,892.14
  4. Step 4: Simplify right side
    93,212.57x = 12,087,971,295.02
  5. Step 5: Solve for x
    x = 12,087,971,295.02/93,212.57
  6. Step 6: Final answer
    x = 129,681.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.