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Finding the Fourth Proportional to 85,138.92, 117,483.30 and 47,416.68

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Solution

The fourth proportional to 85,138.92, 117,483.30 and 47,416.68 is: 65,430.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,138.92 : 117,483.30 = 47,416.68 : x
  2. Step 2: Convert to fraction form
    85,138.92/117,483.30 = 47,416.68/x
  3. Step 3: Cross multiply
    85,138.92x = 117,483.30 × 47,416.68
  4. Step 4: Simplify right side
    85,138.92x = 5,570,668,041.44
  5. Step 5: Solve for x
    x = 5,570,668,041.44/85,138.92
  6. Step 6: Final answer
    x = 65,430.33

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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.