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Finding the Fourth Proportional to 89,422.80, 133,980.60 and 42,574.80

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Solution

The fourth proportional to 89,422.80, 133,980.60 and 42,574.80 is: 63,789.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,422.80 : 133,980.60 = 42,574.80 : x
  2. Step 2: Convert to fraction form
    89,422.80/133,980.60 = 42,574.80/x
  3. Step 3: Cross multiply
    89,422.80x = 133,980.60 × 42,574.80
  4. Step 4: Simplify right side
    89,422.80x = 5,704,197,248.88
  5. Step 5: Solve for x
    x = 5,704,197,248.88/89,422.80
  6. Step 6: Final answer
    x = 63,789.07

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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.