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Finding the Fourth Proportional to 84,901.90, 117,128.28 and 53,015.44

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Solution

The fourth proportional to 84,901.90, 117,128.28 and 53,015.44 is: 73,138.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,901.90 : 117,128.28 = 53,015.44 : x
  2. Step 2: Convert to fraction form
    84,901.90/117,128.28 = 53,015.44/x
  3. Step 3: Cross multiply
    84,901.90x = 117,128.28 × 53,015.44
  4. Step 4: Simplify right side
    84,901.90x = 6,209,607,300.64
  5. Step 5: Solve for x
    x = 6,209,607,300.64/84,901.90
  6. Step 6: Final answer
    x = 73,138.61

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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.