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Finding the Fourth Proportional to 84,005.80, 125,862.90 and 54,408.40

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Solution

The fourth proportional to 84,005.80, 125,862.90 and 54,408.40 is: 81,518.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,005.80 : 125,862.90 = 54,408.40 : x
  2. Step 2: Convert to fraction form
    84,005.80/125,862.90 = 54,408.40/x
  3. Step 3: Cross multiply
    84,005.80x = 125,862.90 × 54,408.40
  4. Step 4: Simplify right side
    84,005.80x = 6,847,999,008.36
  5. Step 5: Solve for x
    x = 6,847,999,008.36/84,005.80
  6. Step 6: Final answer
    x = 81,518.17

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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.