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Finding the Fourth Proportional to 118,018.57, 176,856.14 and 72,943.69

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Solution

The fourth proportional to 118,018.57, 176,856.14 and 72,943.69 is: 109,309.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,018.57 : 176,856.14 = 72,943.69 : x
  2. Step 2: Convert to fraction form
    118,018.57/176,856.14 = 72,943.69/x
  3. Step 3: Cross multiply
    118,018.57x = 176,856.14 × 72,943.69
  4. Step 4: Simplify right side
    118,018.57x = 12,900,539,450.76
  5. Step 5: Solve for x
    x = 12,900,539,450.76/118,018.57
  6. Step 6: Final answer
    x = 109,309.40

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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.