Home / 81,147.52-112,014.82-72,634.62

Finding the Fourth Proportional to 81,147.52, 112,014.82 and 72,634.62

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Solution

The fourth proportional to 81,147.52, 112,014.82 and 72,634.62 is: 100,263.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,147.52 : 112,014.82 = 72,634.62 : x
  2. Step 2: Convert to fraction form
    81,147.52/112,014.82 = 72,634.62/x
  3. Step 3: Cross multiply
    81,147.52x = 112,014.82 × 72,634.62
  4. Step 4: Simplify right side
    81,147.52x = 8,136,153,885.07
  5. Step 5: Solve for x
    x = 8,136,153,885.07/81,147.52
  6. Step 6: Final answer
    x = 100,263.74

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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.