Home / 87,989.96-121,426.08-47,705

Finding the Fourth Proportional to 87,989.96, 121,426.08 and 47,705

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Solution

The fourth proportional to 87,989.96, 121,426.08 and 47,705 is: 65,832.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,989.96 : 121,426.08 = 47,705 : x
  2. Step 2: Convert to fraction form
    87,989.96/121,426.08 = 47,705/x
  3. Step 3: Cross multiply
    87,989.96x = 121,426.08 × 47,705
  4. Step 4: Simplify right side
    87,989.96x = 5,792,631,146.40
  5. Step 5: Solve for x
    x = 5,792,631,146.40/87,989.96
  6. Step 6: Final answer
    x = 65,832.86

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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.