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Finding the Fourth Proportional to 56,515.68, 84,782.88 and 19,079.28

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Solution

The fourth proportional to 56,515.68, 84,782.88 and 19,079.28 is: 28,622.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,515.68 : 84,782.88 = 19,079.28 : x
  2. Step 2: Convert to fraction form
    56,515.68/84,782.88 = 19,079.28/x
  3. Step 3: Cross multiply
    56,515.68x = 84,782.88 × 19,079.28
  4. Step 4: Simplify right side
    56,515.68x = 1,617,596,306.73
  5. Step 5: Solve for x
    x = 1,617,596,306.73/56,515.68
  6. Step 6: Final answer
    x = 28,622.08

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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.