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Finding the Fourth Proportional to 155,683.85, 214,864.13 and 87,713.94

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Solution

The fourth proportional to 155,683.85, 214,864.13 and 87,713.94 is: 121,056.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,683.85 : 214,864.13 = 87,713.94 : x
  2. Step 2: Convert to fraction form
    155,683.85/214,864.13 = 87,713.94/x
  3. Step 3: Cross multiply
    155,683.85x = 214,864.13 × 87,713.94
  4. Step 4: Simplify right side
    155,683.85x = 18,846,578,968.40
  5. Step 5: Solve for x
    x = 18,846,578,968.40/155,683.85
  6. Step 6: Final answer
    x = 121,056.74

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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.