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Finding the Fourth Proportional to 85,235.76, 117,631.44 and 47,509.20

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Solution

The fourth proportional to 85,235.76, 117,631.44 and 47,509.20 is: 65,566.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,235.76 : 117,631.44 = 47,509.20 : x
  2. Step 2: Convert to fraction form
    85,235.76/117,631.44 = 47,509.20/x
  3. Step 3: Cross multiply
    85,235.76x = 117,631.44 × 47,509.20
  4. Step 4: Simplify right side
    85,235.76x = 5,588,575,609.25
  5. Step 5: Solve for x
    x = 5,588,575,609.25/85,235.76
  6. Step 6: Final answer
    x = 65,566.09

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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.