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Finding the Fourth Proportional to 85,438.56, 117,907.56 and 47,715.24

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Solution

The fourth proportional to 85,438.56, 117,907.56 and 47,715.24 is: 65,848.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,438.56 : 117,907.56 = 47,715.24 : x
  2. Step 2: Convert to fraction form
    85,438.56/117,907.56 = 47,715.24/x
  3. Step 3: Cross multiply
    85,438.56x = 117,907.56 × 47,715.24
  4. Step 4: Simplify right side
    85,438.56x = 5,625,987,523.21
  5. Step 5: Solve for x
    x = 5,625,987,523.21/85,438.56
  6. Step 6: Final answer
    x = 65,848.34

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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.