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Finding the Fourth Proportional to 72,150.90, 99,503.78 and 45,295.91

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Solution

The fourth proportional to 72,150.90, 99,503.78 and 45,295.91 is: 62,467.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,150.90 : 99,503.78 = 45,295.91 : x
  2. Step 2: Convert to fraction form
    72,150.90/99,503.78 = 45,295.91/x
  3. Step 3: Cross multiply
    72,150.90x = 99,503.78 × 45,295.91
  4. Step 4: Simplify right side
    72,150.90x = 4,507,113,912.68
  5. Step 5: Solve for x
    x = 4,507,113,912.68/72,150.90
  6. Step 6: Final answer
    x = 62,467.89

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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.