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Finding the Fourth Proportional to 72,748,993.80, 100,378,624.80 and 41,803,184.36

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Solution

The fourth proportional to 72,748,993.80, 100,378,624.80 and 41,803,184.36 is: 57,679,782.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,748,993.80 : 100,378,624.80 = 41,803,184.36 : x
  2. Step 2: Convert to fraction form
    72,748,993.80/100,378,624.80 = 41,803,184.36/x
  3. Step 3: Cross multiply
    72,748,993.80x = 100,378,624.80 × 41,803,184.36
  4. Step 4: Simplify right side
    72,748,993.80x = 4,196,146,158,317,668
  5. Step 5: Solve for x
    x = 4,196,146,158,317,668/72,748,993.80
  6. Step 6: Final answer
    x = 57,679,782.76

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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.