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Finding the Fourth Proportional to 84,819.20, 117,254.40 and 64,774.40

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Solution

The fourth proportional to 84,819.20, 117,254.40 and 64,774.40 is: 89,544.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,819.20 : 117,254.40 = 64,774.40 : x
  2. Step 2: Convert to fraction form
    84,819.20/117,254.40 = 64,774.40/x
  3. Step 3: Cross multiply
    84,819.20x = 117,254.40 × 64,774.40
  4. Step 4: Simplify right side
    84,819.20x = 7,595,083,407.36
  5. Step 5: Solve for x
    x = 7,595,083,407.36/84,819.20
  6. Step 6: Final answer
    x = 89,544.39

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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.