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Finding the Fourth Proportional to 56,978.88, 85,480.80 and 21,935.04

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Solution

The fourth proportional to 56,978.88, 85,480.80 and 21,935.04 is: 32,907.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,978.88 : 85,480.80 = 21,935.04 : x
  2. Step 2: Convert to fraction form
    56,978.88/85,480.80 = 21,935.04/x
  3. Step 3: Cross multiply
    56,978.88x = 85,480.80 × 21,935.04
  4. Step 4: Simplify right side
    56,978.88x = 1,875,024,767.23
  5. Step 5: Solve for x
    x = 1,875,024,767.23/56,978.88
  6. Step 6: Final answer
    x = 32,907.36

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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.