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Finding the Fourth Proportional to 89,974, 134,970.80 and 55,137.52

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Solution

The fourth proportional to 89,974, 134,970.80 and 55,137.52 is: 82,712.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,974 : 134,970.80 = 55,137.52 : x
  2. Step 2: Convert to fraction form
    89,974/134,970.80 = 55,137.52/x
  3. Step 3: Cross multiply
    89,974x = 134,970.80 × 55,137.52
  4. Step 4: Simplify right side
    89,974x = 7,441,955,184.42
  5. Step 5: Solve for x
    x = 7,441,955,184.42/89,974
  6. Step 6: Final answer
    x = 82,712.29

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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.