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Finding the Fourth Proportional to 72,941,870.80, 109,147,085.70 and 53,809,994.80

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Solution

The fourth proportional to 72,941,870.80, 109,147,085.70 and 53,809,994.80 is: 80,518,967.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,941,870.80 : 109,147,085.70 = 53,809,994.80 : x
  2. Step 2: Convert to fraction form
    72,941,870.80/109,147,085.70 = 53,809,994.80/x
  3. Step 3: Cross multiply
    72,941,870.80x = 109,147,085.70 × 53,809,994.80
  4. Step 4: Simplify right side
    72,941,870.80x = 5,873,204,113,952,154
  5. Step 5: Solve for x
    x = 5,873,204,113,952,154/72,941,870.80
  6. Step 6: Final answer
    x = 80,518,967.36

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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.