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Finding the Fourth Proportional to 255,149.76, 382,740.36 and 77,670

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Solution

The fourth proportional to 255,149.76, 382,740.36 and 77,670 is: 116,509.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,149.76 : 382,740.36 = 77,670 : x
  2. Step 2: Convert to fraction form
    255,149.76/382,740.36 = 77,670/x
  3. Step 3: Cross multiply
    255,149.76x = 382,740.36 × 77,670
  4. Step 4: Simplify right side
    255,149.76x = 29,727,443,761.20
  5. Step 5: Solve for x
    x = 29,727,443,761.20/255,149.76
  6. Step 6: Final answer
    x = 116,509.79

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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.