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Finding the Fourth Proportional to 42,407.70, 63,611.55 and 39,297.30

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Solution

The fourth proportional to 42,407.70, 63,611.55 and 39,297.30 is: 58,945.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,407.70 : 63,611.55 = 39,297.30 : x
  2. Step 2: Convert to fraction form
    42,407.70/63,611.55 = 39,297.30/x
  3. Step 3: Cross multiply
    42,407.70x = 63,611.55 × 39,297.30
  4. Step 4: Simplify right side
    42,407.70x = 2,499,762,163.82
  5. Step 5: Solve for x
    x = 2,499,762,163.82/42,407.70
  6. Step 6: Final answer
    x = 58,945.95

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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.