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Finding the Fourth Proportional to 72,375.32, 99,866.30 and 45,498.80

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Solution

The fourth proportional to 72,375.32, 99,866.30 and 45,498.80 is: 62,781.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,375.32 : 99,866.30 = 45,498.80 : x
  2. Step 2: Convert to fraction form
    72,375.32/99,866.30 = 45,498.80/x
  3. Step 3: Cross multiply
    72,375.32x = 99,866.30 × 45,498.80
  4. Step 4: Simplify right side
    72,375.32x = 4,543,796,810.44
  5. Step 5: Solve for x
    x = 4,543,796,810.44/72,375.32
  6. Step 6: Final answer
    x = 62,781.03

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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.