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Finding the Fourth Proportional to 159,387.40, 219,946.02 and 91,407.24

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Solution

The fourth proportional to 159,387.40, 219,946.02 and 91,407.24 is: 126,137.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,387.40 : 219,946.02 = 91,407.24 : x
  2. Step 2: Convert to fraction form
    159,387.40/219,946.02 = 91,407.24/x
  3. Step 3: Cross multiply
    159,387.40x = 219,946.02 × 91,407.24
  4. Step 4: Simplify right side
    159,387.40x = 20,104,658,637.18
  5. Step 5: Solve for x
    x = 20,104,658,637.18/159,387.40
  6. Step 6: Final answer
    x = 126,137.06

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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.