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Finding the Fourth Proportional to 155,989.29, 215,264.99 and 84,369.09

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Solution

The fourth proportional to 155,989.29, 215,264.99 and 84,369.09 is: 116,429.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,989.29 : 215,264.99 = 84,369.09 : x
  2. Step 2: Convert to fraction form
    155,989.29/215,264.99 = 84,369.09/x
  3. Step 3: Cross multiply
    155,989.29x = 215,264.99 × 84,369.09
  4. Step 4: Simplify right side
    155,989.29x = 18,161,712,333.33
  5. Step 5: Solve for x
    x = 18,161,712,333.33/155,989.29
  6. Step 6: Final answer
    x = 116,429.22

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1.5x scale

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.