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Finding the Fourth Proportional to 89,357.40, 133,849.80 and 42,012.90

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Solution

The fourth proportional to 89,357.40, 133,849.80 and 42,012.90 is: 62,931.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,357.40 : 133,849.80 = 42,012.90 : x
  2. Step 2: Convert to fraction form
    89,357.40/133,849.80 = 42,012.90/x
  3. Step 3: Cross multiply
    89,357.40x = 133,849.80 × 42,012.90
  4. Step 4: Simplify right side
    89,357.40x = 5,623,418,262.42
  5. Step 5: Solve for x
    x = 5,623,418,262.42/89,357.40
  6. Step 6: Final answer
    x = 62,931.76

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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.