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Finding the Fourth Proportional to 56,491.92, 84,412.80 and 43,091.28

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Solution

The fourth proportional to 56,491.92, 84,412.80 and 43,091.28 is: 64,388.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,491.92 : 84,412.80 = 43,091.28 : x
  2. Step 2: Convert to fraction form
    56,491.92/84,412.80 = 43,091.28/x
  3. Step 3: Cross multiply
    56,491.92x = 84,412.80 × 43,091.28
  4. Step 4: Simplify right side
    56,491.92x = 3,637,455,600.38
  5. Step 5: Solve for x
    x = 3,637,455,600.38/56,491.92
  6. Step 6: Final answer
    x = 64,388.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.