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Finding the Fourth Proportional to 81,015.80, 121,523.70 and 51,337.40

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Solution

The fourth proportional to 81,015.80, 121,523.70 and 51,337.40 is: 77,006.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,015.80 : 121,523.70 = 51,337.40 : x
  2. Step 2: Convert to fraction form
    81,015.80/121,523.70 = 51,337.40/x
  3. Step 3: Cross multiply
    81,015.80x = 121,523.70 × 51,337.40
  4. Step 4: Simplify right side
    81,015.80x = 6,238,710,796.38
  5. Step 5: Solve for x
    x = 6,238,710,796.38/81,015.80
  6. Step 6: Final answer
    x = 77,006.10

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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.