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Finding the Fourth Proportional to 71,610.30, 107,415.45 and 42,012.90

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Solution

The fourth proportional to 71,610.30, 107,415.45 and 42,012.90 is: 63,019.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,610.30 : 107,415.45 = 42,012.90 : x
  2. Step 2: Convert to fraction form
    71,610.30/107,415.45 = 42,012.90/x
  3. Step 3: Cross multiply
    71,610.30x = 107,415.45 × 42,012.90
  4. Step 4: Simplify right side
    71,610.30x = 4,512,834,559.31
  5. Step 5: Solve for x
    x = 4,512,834,559.31/71,610.30
  6. Step 6: Final answer
    x = 63,019.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.