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Finding the Fourth Proportional to 158,339.76, 218,500.74 and 86,705.93

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Solution

The fourth proportional to 158,339.76, 218,500.74 and 86,705.93 is: 119,649.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,339.76 : 218,500.74 = 86,705.93 : x
  2. Step 2: Convert to fraction form
    158,339.76/218,500.74 = 86,705.93/x
  3. Step 3: Cross multiply
    158,339.76x = 218,500.74 × 86,705.93
  4. Step 4: Simplify right side
    158,339.76x = 18,945,308,774.88
  5. Step 5: Solve for x
    x = 18,945,308,774.88/158,339.76
  6. Step 6: Final answer
    x = 119,649.73

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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.