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Finding the Fourth Proportional to 99,851,684.80, 149,792,042.40 and 42,343,844.80

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Solution

The fourth proportional to 99,851,684.80, 149,792,042.40 and 42,343,844.80 is: 63,521,922.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,851,684.80 : 149,792,042.40 = 42,343,844.80 : x
  2. Step 2: Convert to fraction form
    99,851,684.80/149,792,042.40 = 42,343,844.80/x
  3. Step 3: Cross multiply
    99,851,684.80x = 149,792,042.40 × 42,343,844.80
  4. Step 4: Simplify right side
    99,851,684.80x = 6,342,770,995,660,619
  5. Step 5: Solve for x
    x = 6,342,770,995,660,619/99,851,684.80
  6. Step 6: Final answer
    x = 63,521,922.62

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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.