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Finding the Fourth Proportional to 155,279.88, 214,280.69 and 86,368.95

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Solution

The fourth proportional to 155,279.88, 214,280.69 and 86,368.95 is: 119,186.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,279.88 : 214,280.69 = 86,368.95 : x
  2. Step 2: Convert to fraction form
    155,279.88/214,280.69 = 86,368.95/x
  3. Step 3: Cross multiply
    155,279.88x = 214,280.69 × 86,368.95
  4. Step 4: Simplify right side
    155,279.88x = 18,507,197,768.73
  5. Step 5: Solve for x
    x = 18,507,197,768.73/155,279.88
  6. Step 6: Final answer
    x = 119,186.06

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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.