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Finding the Fourth Proportional to 72,270.80, 99,725 and 40,437.20

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Solution

The fourth proportional to 72,270.80, 99,725 and 40,437.20 is: 55,798.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,270.80 : 99,725 = 40,437.20 : x
  2. Step 2: Convert to fraction form
    72,270.80/99,725 = 40,437.20/x
  3. Step 3: Cross multiply
    72,270.80x = 99,725 × 40,437.20
  4. Step 4: Simplify right side
    72,270.80x = 4,032,599,770.00
  5. Step 5: Solve for x
    x = 4,032,599,770.00/72,270.80
  6. Step 6: Final answer
    x = 55,798.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.