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Finding the Fourth Proportional to 84,678.94, 127,024.62 and 28,518.76

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Solution

The fourth proportional to 84,678.94, 127,024.62 and 28,518.76 is: 42,780.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,678.94 : 127,024.62 = 28,518.76 : x
  2. Step 2: Convert to fraction form
    84,678.94/127,024.62 = 28,518.76/x
  3. Step 3: Cross multiply
    84,678.94x = 127,024.62 × 28,518.76
  4. Step 4: Simplify right side
    84,678.94x = 3,622,584,651.87
  5. Step 5: Solve for x
    x = 3,622,584,651.87/84,678.94
  6. Step 6: Final answer
    x = 42,780.23

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1.5x scale

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.