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Finding the Fourth Proportional to 56,908.04, 85,221.66 and 42,447.80

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Solution

The fourth proportional to 56,908.04, 85,221.66 and 42,447.80 is: 63,566.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,908.04 : 85,221.66 = 42,447.80 : x
  2. Step 2: Convert to fraction form
    56,908.04/85,221.66 = 42,447.80/x
  3. Step 3: Cross multiply
    56,908.04x = 85,221.66 × 42,447.80
  4. Step 4: Simplify right side
    56,908.04x = 3,617,471,979.35
  5. Step 5: Solve for x
    x = 3,617,471,979.35/56,908.04
  6. Step 6: Final answer
    x = 63,566.98

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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.