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Finding the Fourth Proportional to 155,809.17, 214,965.09 and 87,817.77

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Solution

The fourth proportional to 155,809.17, 214,965.09 and 87,817.77 is: 121,159.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,809.17 : 214,965.09 = 87,817.77 : x
  2. Step 2: Convert to fraction form
    155,809.17/214,965.09 = 87,817.77/x
  3. Step 3: Cross multiply
    155,809.17x = 214,965.09 × 87,817.77
  4. Step 4: Simplify right side
    155,809.17x = 18,877,754,831.65
  5. Step 5: Solve for x
    x = 18,877,754,831.65/155,809.17
  6. Step 6: Final answer
    x = 121,159.46

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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.