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Finding the Fourth Proportional to 159,141.60, 219,619.62 and 86,549.40

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Solution

The fourth proportional to 159,141.60, 219,619.62 and 86,549.40 is: 119,440.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,141.60 : 219,619.62 = 86,549.40 : x
  2. Step 2: Convert to fraction form
    159,141.60/219,619.62 = 86,549.40/x
  3. Step 3: Cross multiply
    159,141.60x = 219,619.62 × 86,549.40
  4. Step 4: Simplify right side
    159,141.60x = 19,007,946,339.23
  5. Step 5: Solve for x
    x = 19,007,946,339.23/159,141.60
  6. Step 6: Final answer
    x = 119,440.46

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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.