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Finding the Fourth Proportional to 86,728.96, 119,688.28 and 49,002.40

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Solution

The fourth proportional to 86,728.96, 119,688.28 and 49,002.40 is: 67,624.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,728.96 : 119,688.28 = 49,002.40 : x
  2. Step 2: Convert to fraction form
    86,728.96/119,688.28 = 49,002.40/x
  3. Step 3: Cross multiply
    86,728.96x = 119,688.28 × 49,002.40
  4. Step 4: Simplify right side
    86,728.96x = 5,865,012,971.87
  5. Step 5: Solve for x
    x = 5,865,012,971.87/86,728.96
  6. Step 6: Final answer
    x = 67,624.62

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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.