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Finding the Fourth Proportional to 89,709.82, 134,648.10 and 45,368.40

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Solution

The fourth proportional to 89,709.82, 134,648.10 and 45,368.40 is: 68,094.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,709.82 : 134,648.10 = 45,368.40 : x
  2. Step 2: Convert to fraction form
    89,709.82/134,648.10 = 45,368.40/x
  3. Step 3: Cross multiply
    89,709.82x = 134,648.10 × 45,368.40
  4. Step 4: Simplify right side
    89,709.82x = 6,108,768,860.04
  5. Step 5: Solve for x
    x = 6,108,768,860.04/89,709.82
  6. Step 6: Final answer
    x = 68,094.76

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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.