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Finding the Fourth Proportional to 72,756.09, 100,360.89 and 45,888.93

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Solution

The fourth proportional to 72,756.09, 100,360.89 and 45,888.93 is: 63,299.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,756.09 : 100,360.89 = 45,888.93 : x
  2. Step 2: Convert to fraction form
    72,756.09/100,360.89 = 45,888.93/x
  3. Step 3: Cross multiply
    72,756.09x = 100,360.89 × 45,888.93
  4. Step 4: Simplify right side
    72,756.09x = 4,605,453,855.95
  5. Step 5: Solve for x
    x = 4,605,453,855.95/72,756.09
  6. Step 6: Final answer
    x = 63,299.91

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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.