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Finding the Fourth Proportional to 72,291.97, 99,751.02 and 45,415.45

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Solution

The fourth proportional to 72,291.97, 99,751.02 and 45,415.45 is: 62,665.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,291.97 : 99,751.02 = 45,415.45 : x
  2. Step 2: Convert to fraction form
    72,291.97/99,751.02 = 45,415.45/x
  3. Step 3: Cross multiply
    72,291.97x = 99,751.02 × 45,415.45
  4. Step 4: Simplify right side
    72,291.97x = 4,530,237,461.26
  5. Step 5: Solve for x
    x = 4,530,237,461.26/72,291.97
  6. Step 6: Final answer
    x = 62,665.85

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1.5x scale

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.