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Finding the Fourth Proportional to 155,654.73, 214,813.98 and 86,754.92

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Solution

The fourth proportional to 155,654.73, 214,813.98 and 86,754.92 is: 119,727.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,654.73 : 214,813.98 = 86,754.92 : x
  2. Step 2: Convert to fraction form
    155,654.73/214,813.98 = 86,754.92/x
  3. Step 3: Cross multiply
    155,654.73x = 214,813.98 × 86,754.92
  4. Step 4: Simplify right side
    155,654.73x = 18,636,168,575.71
  5. Step 5: Solve for x
    x = 18,636,168,575.71/155,654.73
  6. Step 6: Final answer
    x = 119,727.61

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1.5x scale

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.