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Finding the Fourth Proportional to 81,852.98, 112,972.62 and 51,240.30

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Solution

The fourth proportional to 81,852.98, 112,972.62 and 51,240.30 is: 70,721.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,852.98 : 112,972.62 = 51,240.30 : x
  2. Step 2: Convert to fraction form
    81,852.98/112,972.62 = 51,240.30/x
  3. Step 3: Cross multiply
    81,852.98x = 112,972.62 × 51,240.30
  4. Step 4: Simplify right side
    81,852.98x = 5,788,750,940.59
  5. Step 5: Solve for x
    x = 5,788,750,940.59/81,852.98
  6. Step 6: Final answer
    x = 70,721.32

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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.