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Finding the Fourth Proportional to 81,966.90, 122,950.35 and 25,814.10

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Solution

The fourth proportional to 81,966.90, 122,950.35 and 25,814.10 is: 38,721.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,966.90 : 122,950.35 = 25,814.10 : x
  2. Step 2: Convert to fraction form
    81,966.90/122,950.35 = 25,814.10/x
  3. Step 3: Cross multiply
    81,966.90x = 122,950.35 × 25,814.10
  4. Step 4: Simplify right side
    81,966.90x = 3,173,852,629.94
  5. Step 5: Solve for x
    x = 3,173,852,629.94/81,966.90
  6. Step 6: Final answer
    x = 38,721.15

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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.