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Finding the Fourth Proportional to 239,012.92, 358,527.95 and 81,220.87

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Solution

The fourth proportional to 239,012.92, 358,527.95 and 81,220.87 is: 121,834.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,012.92 : 358,527.95 = 81,220.87 : x
  2. Step 2: Convert to fraction form
    239,012.92/358,527.95 = 81,220.87/x
  3. Step 3: Cross multiply
    239,012.92x = 358,527.95 × 81,220.87
  4. Step 4: Simplify right side
    239,012.92x = 29,119,952,018.32
  5. Step 5: Solve for x
    x = 29,119,952,018.32/239,012.92
  6. Step 6: Final answer
    x = 121,834.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.