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Finding the Fourth Proportional to 66,400,891.80, 99,601,337.70 and 46,917,346.20

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Solution

The fourth proportional to 66,400,891.80, 99,601,337.70 and 46,917,346.20 is: 70,376,019.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,400,891.80 : 99,601,337.70 = 46,917,346.20 : x
  2. Step 2: Convert to fraction form
    66,400,891.80/99,601,337.70 = 46,917,346.20/x
  3. Step 3: Cross multiply
    66,400,891.80x = 99,601,337.70 × 46,917,346.20
  4. Step 4: Simplify right side
    66,400,891.80x = 4,673,030,442,854,012
  5. Step 5: Solve for x
    x = 4,673,030,442,854,012/66,400,891.80
  6. Step 6: Final answer
    x = 70,376,019.30

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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.