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Finding the Fourth Proportional to 72,349,837.80, 108,524,756.70 and 49,391,586.60

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Solution

The fourth proportional to 72,349,837.80, 108,524,756.70 and 49,391,586.60 is: 74,087,379.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,349,837.80 : 108,524,756.70 = 49,391,586.60 : x
  2. Step 2: Convert to fraction form
    72,349,837.80/108,524,756.70 = 49,391,586.60/x
  3. Step 3: Cross multiply
    72,349,837.80x = 108,524,756.70 × 49,391,586.60
  4. Step 4: Simplify right side
    72,349,837.80x = 5,360,209,918,791,981
  5. Step 5: Solve for x
    x = 5,360,209,918,791,981/72,349,837.80
  6. Step 6: Final answer
    x = 74,087,379.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.