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Finding the Fourth Proportional to 43,130.88, 64,784.88 and 28,360.80

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Solution

The fourth proportional to 43,130.88, 64,784.88 and 28,360.80 is: 42,599.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,130.88 : 64,784.88 = 28,360.80 : x
  2. Step 2: Convert to fraction form
    43,130.88/64,784.88 = 28,360.80/x
  3. Step 3: Cross multiply
    43,130.88x = 64,784.88 × 28,360.80
  4. Step 4: Simplify right side
    43,130.88x = 1,837,351,024.70
  5. Step 5: Solve for x
    x = 1,837,351,024.70/43,130.88
  6. Step 6: Final answer
    x = 42,599.43

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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.