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Finding the Fourth Proportional to 159,417.81, 219,989.48 and 91,386.01

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Solution

The fourth proportional to 159,417.81, 219,989.48 and 91,386.01 is: 126,108.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,417.81 : 219,989.48 = 91,386.01 : x
  2. Step 2: Convert to fraction form
    159,417.81/219,989.48 = 91,386.01/x
  3. Step 3: Cross multiply
    159,417.81x = 219,989.48 × 91,386.01
  4. Step 4: Simplify right side
    159,417.81x = 20,103,960,819.17
  5. Step 5: Solve for x
    x = 20,103,960,819.17/159,417.81
  6. Step 6: Final answer
    x = 126,108.62

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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.