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Finding the Fourth Proportional to 84,805.63, 127,223.10 and 28,646.15

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Solution

The fourth proportional to 84,805.63, 127,223.10 and 28,646.15 is: 42,974.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,805.63 : 127,223.10 = 28,646.15 : x
  2. Step 2: Convert to fraction form
    84,805.63/127,223.10 = 28,646.15/x
  3. Step 3: Cross multiply
    84,805.63x = 127,223.10 × 28,646.15
  4. Step 4: Simplify right side
    84,805.63x = 3,644,451,477.37
  5. Step 5: Solve for x
    x = 3,644,451,477.37/84,805.63
  6. Step 6: Final answer
    x = 42,974.17

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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.