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Finding the Fourth Proportional to 93,680.76, 139,842.15 and 86,743.92

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Solution

The fourth proportional to 93,680.76, 139,842.15 and 86,743.92 is: 129,487.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,680.76 : 139,842.15 = 86,743.92 : x
  2. Step 2: Convert to fraction form
    93,680.76/139,842.15 = 86,743.92/x
  3. Step 3: Cross multiply
    93,680.76x = 139,842.15 × 86,743.92
  4. Step 4: Simplify right side
    93,680.76x = 12,130,456,272.23
  5. Step 5: Solve for x
    x = 12,130,456,272.23/93,680.76
  6. Step 6: Final answer
    x = 129,487.17

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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.