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Finding the Fourth Proportional to 145,370.59, 218,053.15 and 79,231.61

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Solution

The fourth proportional to 145,370.59, 218,053.15 and 79,231.61 is: 118,845.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,370.59 : 218,053.15 = 79,231.61 : x
  2. Step 2: Convert to fraction form
    145,370.59/218,053.15 = 79,231.61/x
  3. Step 3: Cross multiply
    145,370.59x = 218,053.15 × 79,231.61
  4. Step 4: Simplify right side
    145,370.59x = 17,276,702,932.80
  5. Step 5: Solve for x
    x = 17,276,702,932.80/145,370.59
  6. Step 6: Final answer
    x = 118,845.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.