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Finding the Fourth Proportional to 155,981.48, 215,254.46 and 84,361.49

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Solution

The fourth proportional to 155,981.48, 215,254.46 and 84,361.49 is: 116,418.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,981.48 : 215,254.46 = 84,361.49 : x
  2. Step 2: Convert to fraction form
    155,981.48/215,254.46 = 84,361.49/x
  3. Step 3: Cross multiply
    155,981.48x = 215,254.46 × 84,361.49
  4. Step 4: Simplify right side
    155,981.48x = 18,159,185,476.67
  5. Step 5: Solve for x
    x = 18,159,185,476.67/155,981.48
  6. Step 6: Final answer
    x = 116,418.86

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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.